{"title":"Holley EFI","description":"\u003cp\u003eBuilt for your HEMI platform, our Holley EFI collection offers a range of aftermarket fuel system parts designed to enhance power delivery, throttle response, and overall engine efficiency. Whether you’re upgrading a 5.7L, 6.1L, 6.4L, or 6.2L HEMI, these EFI components are engineered to support high-performance builds and reliable tuning.\u003c\/p\u003e\n\u003cp\u003eIn this category, you’ll find everything from fuel injection systems and controllers to sensors and wiring harnesses—each selected to optimize your engine’s fuel management and maximize drivability. Holley EFI parts provide precise fuel control and adaptability, helping you unlock the full potential of your HEMI-powered vehicle.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eComplete EFI systems and controllers\u003c\/li\u003e\n\u003cli\u003eFuel pumps and regulators\u003c\/li\u003e\n\u003cli\u003eSensors and wiring accessories\u003c\/li\u003e\n\u003cli\u003eTuners and software support\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eShop Holley EFI upgrades for your HEMI platform at FastHemis.\u003c\/p\u003e","products":[{"product_id":"holley-efi-holley-gen-iii-hemi-hi-ram-efi-manifold-300-650","title":"Holley EFI Gen III Hemi Hi-Ram EFI Manifold: Fits Chrysler \/ Dodge \/ Jeep \/ Ram (05-26)","description":"\u003ch3\u003eHolley EFI Gen III Hemi Hi-Ram EFI Manifold\u003c\/h3\u003e\u003cp\u003e2005–2020 Chrysler 300, 2006–2020 Dodge Charger, 2008–2020 Dodge Challenger, 2011–2020 Ram 1500, 2009–2010 Dodge Ram 1500, 2011–2020 Ram 2500, 2009–2010 Dodge Ram 2500, 2011–2020 Ram 3500, 2009 Dodge Ram 3500, 2006–2008 Dodge Magnum, 2006–2020 Dodge Durango, 2018–2020 Dodge Durango SRT, 2006–2020 Jeep Grand Cherokee, 2010–2020 Jeep Grand Cherokee SRT\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003e300-650\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eOverview:\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eThe Holley EFI Gen III Hemi Hi-Ram EFI Manifold is engineered for high-performance naturally aspirated, forced induction, and nitrous applications within the 5.7 to 7.2+ liter engine range. Designed to maximize power output at high RPMs between 7500 and 8500, this intake manifold is ideal for enthusiasts seeking to unlock the full potential of their Gen III Hemi engines. Its tall, race-inspired Hi-Ram design is perfect for applications where induction system height is not restricted, making it a versatile choice for muscle cars, drag racing, off-road vehicles, and street rods.\u003c\/p\u003e\u003cp\u003eCompatible with 2009 and newer 5.7L, 2005–2010 6.1L, and 2011 and newer 6.4L Gen III Hemi engines, this manifold pairs exceptionally well with high-flow cylinder heads to deliver outstanding airflow and power gains. Whether building a naturally aspirated beast or a boosted powerhouse, the Holley Hi-Ram manifold provides a solid foundation for serious performance upgrades.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eKey Features:\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eDesigned with precision and performance in mind, the Holley EFI Gen III Hemi Hi-Ram EFI Manifold offers a range of advanced features to enhance engine output and reliability:\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eCompatible with Gen III Hemi and Bosch EV-1 style fuel injectors for flexible fuel delivery options\u003c\/li\u003e\n\u003cli\u003ePositive Crankcase Ventilation (PCV) ports with adapter fittings for proper crankcase ventilation integration\u003c\/li\u003e\n\u003cli\u003eModular manifold base available separately, allowing custom induction system configurations\u003c\/li\u003e\n\u003cli\u003eLarge retained O-ring seals provide superior OE-style sealing and easy maintenance\u003c\/li\u003e\n\u003cli\u003eOptimized runner length and tapered cross-section for broad engine compatibility and improved airflow\u003c\/li\u003e\n\u003cli\u003eCast aluminum construction with natural satin or black finish for durability and style\u003c\/li\u003e\n\u003cli\u003eIncludes EFI fuel rails machined for -8 AN O-ring fittings with large passages to support high fuel flow and reduce pressure pulsations\u003c\/li\u003e\n\u003cli\u003ePort for OE-style Manifold Absolute Pressure (MAP) sensor (1 or 2 Bar) for accurate engine management\u003c\/li\u003e\n\u003cli\u003eCast-in pads for nitrous nozzle installation, supporting additional power adders\u003c\/li\u003e\n\u003cli\u003eBillet oil fill cap with a low-profile, attractive design\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eConstruction \u0026amp; Design:\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eCrafted from high-quality cast aluminum, the Holley Hi-Ram intake manifold combines strength and lightweight properties essential for performance applications. The manifold’s design features large intake ports measuring 1.70 inches in height by 1.88 inches in width, perfectly matching the large port Gen III Hemi cylinder heads. Its tall Hi-Ram configuration enhances volumetric efficiency at high RPMs, while the tapered runner cross-section and carefully engineered runner length optimize airflow velocity and distribution.\u003c\/p\u003e\u003cp\u003eThe manifold base is designed to be modular, offering builders and fabricators the flexibility to pair it with a variety of EFI tops or custom induction setups. The inclusion of large O-ring seals ensures a reliable, leak-free connection to the cylinder heads, maintaining consistent performance under demanding conditions.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eInstallation \u0026amp; Fitment:\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eThis intake manifold is a direct fit for a wide range of Gen III Hemi-powered vehicles, including Ram 1500, 2500, and 3500 models from 2009 through 2020, Chrysler 300 (2005–2020), Dodge Challenger and Charger (2006–2020), Dodge Durango (2009–2020), Dodge Magnum (2006–2008), and Jeep Grand Cherokee (2006–2020). Installation requires standard intake manifold replacement procedures and is compatible with factory fuel injectors and EFI systems designed for Gen III Hemi engines. No major modifications are typically necessary, making it a straightforward upgrade for serious performance enthusiasts.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat's Included:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eCast aluminum Hi-Ram intake manifold base\u003c\/li\u003e\n\u003cli\u003eEFI fuel rails with -8 AN O-ring fittings\u003c\/li\u003e\n\u003cli\u003eBillet oil fill cap\u003c\/li\u003e\n\u003cli\u003eAdapter fittings for PCV ports\u003c\/li\u003e\n\u003cli\u003eRetained O-ring seals for manifold-to-head sealing\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eIdeal For:\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eThe Holley EFI Gen III Hemi Hi-Ram EFI Manifold is perfect for racers, muscle car enthusiasts, and builders seeking maximum power from naturally aspirated, supercharged, turbocharged, or nitrous-assisted Gen III Hemi engines. Its aggressive styling and race-bred performance make it a top choice for drag racing, marine applications, off-road vehicles, sandrails, pulling trucks, track cars, and street rods. If you demand high RPM power and reliable fuel delivery, this manifold delivers a proven solution.\u003c\/p\u003e","brand":"Holley EFI","offers":[{"title":"Default Title","offer_id":47315667878100,"sku":"300-650","price":1213.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0660\/8542\/1268\/files\/3440_f16cf34f00444f17bdc6871c3372eab4a823520c_994553b6-fa5d-4b95-9ee8-4a41ec328b4c.webp?v=1766655099"},{"product_id":"holley-efi-holley-gen-iii-hemi-hi-ram-efi-manifold-300-651bk","title":"Holley EFI Gen III Hemi Hi-Ram EFI Manifold (Black): Fits Chrysler \/ Dodge \/ Jeep \/ Ram (05-26)","description":"\u003ch3\u003eHolley EFI Gen III Hemi Hi-Ram EFI Manifold\u003c\/h3\u003e\u003cp\u003e2005–2020 Chrysler 300, 2006–2020 Dodge Charger, 2008–2020 Dodge Challenger, 2006–2020 Jeep Grand Cherokee, 2009–2020 Ram 1500 \/ 2500 \/ 3500, 2006–2008 Dodge Magnum, 2009–2020 Dodge Durango\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003e300-651BK\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eOverview:\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eThe Holley EFI Gen III Hemi Hi-Ram EFI Manifold is engineered to maximize power output on naturally aspirated, forced induction, or nitrous-equipped Gen III Hemi engines ranging from 5.7 to over 7.2 liters. Designed for high-RPM performance, this intake manifold excels in delivering peak power between 7,500 and 8,500 RPM. Its modular base allows for versatile configurations, making it an excellent foundation for custom induction setups favored by builders and fabricators. Whether you're upgrading a muscle car, truck, or off-road rig, the Hi-Ram manifold offers aggressive styling and race-proven performance to elevate your Gen III Hemi engine.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eKey Features:\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eBuilt to meet the demands of high-performance applications, the Holley Hi-Ram manifold incorporates advanced design elements and quality components:\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eO-ring seal to cylinder head with large retained O-rings for superior OE-style sealing and easy replacement\u003c\/li\u003e\n\u003cli\u003eCast-in pads for nitrous nozzle installation, supporting nitrous oxide applications\u003c\/li\u003e\n\u003cli\u003eCast aluminum construction available in natural satin or black finish for durability and style\u003c\/li\u003e\n\u003cli\u003eModular manifold base sold separately, enabling custom induction system builds\u003c\/li\u003e\n\u003cli\u003eRunner length and tapered cross-section optimized for a broad range of engine configurations\u003c\/li\u003e\n\u003cli\u003eIncludes EFI fuel rails machined for -8 AN O-ring fittings with large passages to support high fuel flow and reduce pressure pulsations\u003c\/li\u003e\n\u003cli\u003eCompatibility with Gen III Hemi and Bosch EV-1 style fuel injectors\u003c\/li\u003e\n\u003cli\u003ePositive crankcase ventilation (PCV) ports with adapter fittings for proper crankcase venting\u003c\/li\u003e\n\u003cli\u003ePort for OE-style manifold absolute pressure (MAP) sensor (1 or 2 bar)\u003c\/li\u003e\n\u003cli\u003eBillet oil fill cap with a low-profile, attractive design\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eConstruction \u0026amp; Design:\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eThe Hi-Ram manifold is crafted from high-quality cast aluminum, providing a strong yet lightweight solution that withstands the rigors of high-performance use. Its satin or black finish offers corrosion resistance and a sleek appearance under the hood. The intake features large, tapered runners and a cross-section engineered to optimize airflow for both naturally aspirated and forced induction setups. The modular base design enhances versatility, allowing builders to adapt the manifold to custom EFI tops or unique induction configurations.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eInstallation \u0026amp; Fitment:\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eThis manifold is designed to fit a wide range of Gen III Hemi engines with large intake ports, including 2009 and newer 5.7L engines, 2005 to 2010 6.1L engines, and 2011 and newer 6.4L engines. Installation requires standard intake manifold procedures and is compatible with factory-style fuel injectors and EFI systems. The manifold’s height of 11.59 inches makes it ideal for applications where induction system height is not restricted. It fits a broad spectrum of vehicles including Ram 1500, 2500, and 3500 (model years 2009–2020), Chrysler 300 (2005–2020), Dodge Challenger (2008–2020), Charger (2006–2020), Durango (2009–2020), Magnum (2006–2008), and Jeep Grand Cherokee (2006–2020).\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat's Included:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eHolley EFI Gen III Hemi Hi-Ram intake manifold\u003c\/li\u003e\n\u003cli\u003eEFI fuel rails with -8 AN O-ring fittings\u003c\/li\u003e\n\u003cli\u003eBillet oil fill cap\u003c\/li\u003e\n\u003cli\u003eAdapter fittings for PCV ports\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eIdeal For:\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eThis manifold is perfect for enthusiasts and professional builders seeking to extract maximum power from Gen III Hemi engines in muscle cars, drag racers, street rods, off-road vehicles, marine applications, sandrails, and pulling trucks. Its design supports both naturally aspirated and forced induction setups, making it a versatile choice for high-RPM performance builds where induction height clearance is not a limiting factor.\u003c\/p\u003e","brand":"Holley EFI","offers":[{"title":"Default Title","offer_id":47315667910868,"sku":"300-651BK","price":1393.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0660\/8542\/1268\/files\/3441_79c9ee08d7a29d25d8e0ed5b14ddbec9d6d8e4af_a51600e0-cb5f-4afc-a96e-5dab30315398.webp?v=1766655098"},{"product_id":"holley-efi-holley-gen-iii-hemi-hi-ram-efi-manifold-300-650bk","title":"Holley EFI Gen III Hemi Hi-Ram EFI Manifold (Black): Fits Chrysler \/ Dodge \/ Jeep \/ Ram (05-26)","description":"\u003ch3\u003eHolley EFI Gen III Hemi Hi-Ram EFI Manifold\u003c\/h3\u003e\u003cp\u003e2005–2020 Chrysler 300, 2006–2020 Dodge Charger, 2008–2020 Dodge Challenger, 2011–2020 Ram 1500 \/ 2500 \/ 3500, 2009–2020 Dodge Durango, 2006–2020 Jeep Grand Cherokee, and More\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003e300-650BK\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eOverview:\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eThe Holley EFI Gen III Hemi Hi-Ram EFI Manifold is a high-performance intake solution designed specifically for Gen III Hemi engines ranging from 5.7L to over 7.2L displacement. Engineered to maximize airflow and fuel delivery, this manifold is ideal for enthusiasts and builders seeking to extract more power from naturally aspirated, forced induction, or nitrous-equipped setups. Its modular design allows compatibility with a wide range of EFI tops, making it an excellent foundation for custom induction systems.\u003c\/p\u003e\u003cp\u003eBuilt to fit large intake port Gen III Hemi engines—including 2009 and newer 5.7L, 2005–2010 6.1L, and 2011 and newer 6.4L variants—this manifold delivers exceptional performance potential at high RPMs, typically between 7,500 and 8,500. Whether you’re upgrading a muscle car, truck, or off-road rig, the Holley Hi-Ram manifold combines race-inspired styling with functional engineering to enhance throttle response and horsepower.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eKey Features:\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eThis manifold offers a comprehensive set of features designed to optimize performance and ease of use:\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eModular base design accepts a variety of EFI tops for custom induction builds\u003c\/li\u003e\n\u003cli\u003eLarge intake ports measuring 1.70” height by 1.88” width for improved airflow\u003c\/li\u003e\n\u003cli\u003eCast aluminum construction with a natural satin or black finish for durability and style\u003c\/li\u003e\n\u003cli\u003eEFI fuel rails machined for -8AN O-ring fittings with large passages to support high fuel flow and reduce pressure pulsations\u003c\/li\u003e\n\u003cli\u003eCompatibility with Gen III Hemi and Bosch EV-1 style fuel injectors\u003c\/li\u003e\n\u003cli\u003ePositive Crankcase Ventilation (PCV) ports with adapter fittings for emissions and crankcase management\u003c\/li\u003e\n\u003cli\u003ePort for OE-style Manifold Absolute Pressure (MAP) sensor (1 or 2 bar)\u003c\/li\u003e\n\u003cli\u003eCast-in pads for nitrous nozzle installation, supporting nitrous applications\u003c\/li\u003e\n\u003cli\u003eBillet oil fill cap with a low-profile, attractive design\u003c\/li\u003e\n\u003cli\u003eOverall manifold height of 11.59” suitable for applications without height restrictions\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eConstruction \u0026amp; Design:\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eThe Holley Hi-Ram intake manifold is crafted from high-quality cast aluminum, providing a lightweight yet robust structure that withstands the rigors of high-performance use. Its runner length and tapered cross-section are carefully engineered to optimize airflow velocity and distribution across a broad range of engine configurations. The large retained O-ring seals ensure superior OE-style sealing against the cylinder heads, simplifying maintenance and enhancing reliability.\u003c\/p\u003e\u003cp\u003eThe manifold’s modular base design appeals to fabricators and builders who want to tailor their induction system, allowing for easy integration with various EFI tops or custom setups. The satin or black finish options offer both corrosion resistance and a race-inspired aesthetic that complements aggressive engine bays.\u003c\/p\u003e\u003cp\u003ePerformance \u0026amp; Sound\u003c\/p\u003e\u003cp\u003eDesigned to unlock the full potential of Gen III Hemi engines, the Hi-Ram manifold excels at delivering maximum power in the upper RPM range, making it ideal for drag racing, muscle cars, and high-performance street applications. Its large intake ports and efficient runner design improve volumetric efficiency, resulting in stronger throttle response and increased horsepower. Whether naturally aspirated or boosted, this manifold supports aggressive tuning and delivers a commanding induction sound that matches its bold styling.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eInstallation \u0026amp; Fitment:\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eThe Holley Hi-Ram manifold is a direct fit for 2009–2020 Ram 1500, 2500, and 3500 models, 2005–2020 Chrysler 300, 2006–2020 Dodge Charger, 2008–2020 Dodge Challenger, 2009–2020 Dodge Durango, 2006–2020 Jeep Grand Cherokee, and related SRT and Magnum variants within these year ranges. Installation requires standard intake manifold procedures and is best performed by experienced technicians or knowledgeable enthusiasts. Due to its height and design, it is intended for applications where induction system height is not restricted.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat's Included:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eCast aluminum Hi-Ram intake manifold base\u003c\/li\u003e\n\u003cli\u003eEFI fuel rails with -8AN O-ring fittings\u003c\/li\u003e\n\u003cli\u003eBillet oil fill cap\u003c\/li\u003e\n\u003cli\u003eAdapter fittings for PCV ports\u003c\/li\u003e\n\u003cli\u003eO-ring seals for cylinder head mounting\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eIdeal For:\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eThis manifold is perfect for performance enthusiasts, racers, and custom builders who demand maximum airflow and fuel delivery for Gen III Hemi engines. It suits naturally aspirated setups, forced induction builds, and nitrous applications alike. Whether upgrading a muscle car, street rod, marine engine, off-road vehicle, or pulling truck, the Holley Hi-Ram manifold provides a versatile and powerful foundation for serious power gains.\u003c\/p\u003e","brand":"Holley EFI","offers":[{"title":"Default Title","offer_id":47315667943636,"sku":"300-650BK","price":1303.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0660\/8542\/1268\/files\/3442_79c9ee08d7a29d25d8e0ed5b14ddbec9d6d8e4af_a384e28d-99b3-438d-adf6-40e7a7d4ee0e.webp?v=1766655097"},{"product_id":"holley-efi-holley-intake-manifold-adapter-plates-300-652","title":"Holley EFI Billet Aluminum Intake Manifold Adapter Plates: Fits most Hemi Models","description":"\u003ch3\u003eHolley EFI Billet Aluminum Intake Manifold Adapter Plates\u003c\/h3\u003e\u003cp\u003e2002–2008 Chrysler 300 \/ Dodge Ram 1500 \/ Ram 2500 \/ Ram 3500 \/ Charger \/ Durango \/ Magnum \/ Jeep Grand Cherokee 5.7L Gen III Hemi\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003e300-652\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eOverview:\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eThe Holley EFI Billet Aluminum Intake Manifold Adapter Plates are engineered to bridge the gap between early 5.7L Gen III Hemi engines and larger port intake manifolds. Specifically designed for 2002 to 2008 Chrysler and Dodge vehicles equipped with the early generation small intake port Hemi engines, these adapter plates enable the installation of Gen III Hemi Hi-Ram intake manifolds that originally fit only larger port engines. This upgrade allows enthusiasts and performance builders to unlock enhanced airflow potential without the need for costly cylinder head modifications.\u003c\/p\u003e\u003cp\u003eIdeal for owners of Chrysler 300, Dodge Ram 1500, 2500, 3500, Charger, Durango, Magnum, and Jeep Grand Cherokee models from the early to mid-2000s, these adapter plates provide a seamless and reliable solution to improve intake manifold compatibility and performance.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eKey Features:\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eDesigned with precision and durability in mind, the Holley EFI adapter plates offer the following benefits:\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eEnables use of Gen III Hemi Hi-Ram intake manifolds on early small intake port 5.7L Hemi engines\u003c\/li\u003e\n\u003cli\u003eManufactured from high-quality billet aluminum for strength and lightweight performance\u003c\/li\u003e\n\u003cli\u003eIncludes all necessary hardware and gaskets for straightforward installation\u003c\/li\u003e\n\u003cli\u003ePrecisely machined 0.945\" thickness to maintain proper manifold alignment and sealing\u003c\/li\u003e\n\u003cli\u003eCompatible with a wide range of Chrysler and Dodge vehicles from 2002 to 2008\u003c\/li\u003e\n\u003cli\u003eImproves airflow potential by adapting larger port manifolds to early engines\u003c\/li\u003e\n\u003cli\u003eCorrosion-resistant finish ensures long-lasting durability under engine bay conditions\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eConstruction \u0026amp; Design:\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eHolley EFI’s adapter plates are crafted from billet aluminum, chosen for its excellent strength-to-weight ratio and resistance to heat and corrosion. The plates are CNC-machined to exacting tolerances, ensuring a perfect fit between the intake manifold and the cylinder heads. The 0.945-inch thickness is engineered to maintain optimal intake manifold positioning, preventing leaks and ensuring consistent airflow. The billet construction also contributes to improved thermal stability compared to cast or stamped alternatives.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eInstallation \u0026amp; Fitment:\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eInstallation of the Holley EFI intake manifold adapter plates is straightforward and designed to fit directly onto early 5.7L Gen III Hemi engines without the need for modifications to the cylinder heads or intake manifold. The included hardware and gaskets simplify the process, allowing for a secure and leak-free seal. These adapter plates are compatible with the following vehicles equipped with the 5.7L Gen III Hemi engine:\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eChrysler 300 (2005–2008)\u003c\/li\u003e\n\u003cli\u003eDodge Ram 1500 (2003–2008)\u003c\/li\u003e\n\u003cli\u003eDodge Ram 2500 (2003–2008)\u003c\/li\u003e\n\u003cli\u003eDodge Ram 3500 (2002–2008)\u003c\/li\u003e\n\u003cli\u003eDodge Charger (2006–2008)\u003c\/li\u003e\n\u003cli\u003eDodge Durango (2004–2008)\u003c\/li\u003e\n\u003cli\u003eDodge Magnum (2005–2008)\u003c\/li\u003e\n\u003cli\u003eJeep Grand Cherokee (2005–2008)\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eWhat's Included:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eBillet aluminum intake manifold adapter plates\u003c\/li\u003e\n\u003cli\u003eComplete set of mounting hardware\u003c\/li\u003e\n\u003cli\u003eHigh-quality intake manifold gaskets\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eIdeal For:\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eThis product is perfect for automotive enthusiasts, performance tuners, and engine builders looking to upgrade early 5.7L Gen III Hemi engines with larger port intake manifolds. Whether restoring, modifying, or enhancing your Chrysler or Dodge vehicle’s engine, these adapter plates provide a cost-effective and reliable solution to improve airflow and support higher performance setups without extensive engine modifications.\u003c\/p\u003e","brand":"Holley EFI","offers":[{"title":"Default Title","offer_id":47315667976404,"sku":"300-652","price":307.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0660\/8542\/1268\/files\/3443_52c38649d2360f1c75f37d0dfab5589c61b6e8f8_c8328a12-e5fb-4a13-bf9d-6b8172976667.webp?v=1766655097"},{"product_id":"holley-efi-holley-gen-iii-hemi-hi-ram-efi-manifold-300-658","title":"Holley EFI Gen III Hemi Hi-Ram EFI Manifold: Chrysler 300 (05-15) \/ Dodge Ram 1500 (03-10)","description":"\u003ch3\u003eHolley EFI Gen III Hemi Hi-Ram EFI Manifold\u003c\/h3\u003e\u003cp\u003e2005–2010 Dodge \/ Chrysler \/ Jeep 6.1L, 2009+ 5.7L, 2011+ 6.4L Gen III Hemi Engines\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003e300-658\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eOverview:\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eThe Holley EFI Gen III Hemi Hi-Ram EFI Manifold is a high-performance intake solution designed specifically for Gen III Hemi engines ranging from 5.7L to 6.4L displacement. Engineered to maximize airflow and fuel delivery, this cast aluminum manifold is ideal for enthusiasts seeking to extract more power from naturally aspirated, forced induction, or nitrous-equipped setups. Its large intake ports and precision-machined EFI fuel rails support high fuel flow rates while reducing pressure pulsations, ensuring consistent and efficient combustion at high RPMs.\u003c\/p\u003e\u003cp\u003eWhether you are building a muscle car, drag racer, off-road machine, or street rod, the Holley Hi-Ram manifold offers aggressive styling and race-bred performance. It is designed for applications where induction system height is not a limiting factor, making it a versatile choice for a wide range of high-output Gen III Hemi builds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eKey Features:\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eThis intake manifold combines advanced engineering with practical features to enhance power and reliability:\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eCast aluminum construction with a natural satin or black finish for durability and style\u003c\/li\u003e\n\u003cli\u003eLarge intake ports measuring 1.70” height by 1.88” width, compatible with 2009+ 5.7L, 2005–2010 6.1L, and 2011+ 6.4L Gen III Hemi engines\u003c\/li\u003e\n\u003cli\u003eEFI fuel rails machined for -8AN O-ring fittings, featuring large passages to support high fuel flow and dampen pressure pulsations\u003c\/li\u003e\n\u003cli\u003eCast-in pads for easy installation of nitrous nozzles, expanding tuning possibilities\u003c\/li\u003e\n\u003cli\u003ePositive Crankcase Ventilation (PCV) ports with adapter fittings for proper engine ventilation\u003c\/li\u003e\n\u003cli\u003ePort for OE-style Manifold Absolute Pressure (MAP) sensor (1 or 2 Bar) to maintain accurate engine management\u003c\/li\u003e\n\u003cli\u003eModular base design allowing compatibility with a wide range of EFI tops and custom induction setups\u003c\/li\u003e\n\u003cli\u003eRunner length and tapered cross-section optimized for broad engine configurations and RPM ranges\u003c\/li\u003e\n\u003cli\u003eBillet oil fill cap with a low-profile, attractive design\u003c\/li\u003e\n\u003cli\u003eLarge retained O-ring seals for superior OE-style sealing and easy maintenance\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eConstruction \u0026amp; Design:\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eThe Holley Hi-Ram manifold is crafted from high-quality cast aluminum, providing a lightweight yet robust foundation for high-performance applications. Its satin or black finish offers corrosion resistance and a sleek appearance that complements any engine bay. The design features large, tapered runners that promote efficient airflow and fuel atomization, supporting maximum power output at elevated RPMs between 7,500 and 8,500.\u003c\/p\u003e\u003cp\u003eThe modular base allows builders and fabricators to customize their induction systems by pairing the manifold with various EFI tops. Precision-machined fuel rails and O-ring fittings ensure leak-free fuel delivery, while the cast-in nitrous nozzle pads and PCV ports add versatility for different power adders and engine management setups.\u003c\/p\u003e\u003cp\u003ePerformance \u0026amp; Sound\u003c\/p\u003e\u003cp\u003eOptimized for high-RPM power, the Holley Hi-Ram manifold enhances throttle response and volumetric efficiency on Gen III Hemi engines. Its large intake ports and tapered runners improve airflow dynamics, supporting aggressive cam profiles and forced induction systems alike. The manifold’s design contributes to a more aggressive induction sound, underscoring the performance intent of your build.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eInstallation \u0026amp; Fitment:\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eThis manifold fits Gen III Hemi engines with large intake ports, including 2009 and newer 5.7L, 2005 through 2010 6.1L, and 2011 and newer 6.4L variants. It is compatible with Gen III Hemi fuel injectors and Bosch EV-1 style injectors. Installation requires standard intake manifold procedures and may necessitate custom tuning to optimize fuel and ignition parameters for your specific setup. The modular design also allows for easy integration into custom induction systems.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat's Included:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eCast aluminum Hi-Ram intake manifold base\u003c\/li\u003e\n\u003cli\u003eEFI fuel rails with -8AN O-ring fittings\u003c\/li\u003e\n\u003cli\u003eBillet oil fill cap\u003c\/li\u003e\n\u003cli\u003eAdapter fittings for PCV ports\u003c\/li\u003e\n\u003cli\u003eProvision for OE-style MAP sensor\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eIdeal For:\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eThe Holley EFI Gen III Hemi Hi-Ram EFI Manifold is perfect for performance enthusiasts and professional builders seeking to maximize power on naturally aspirated, forced induction, or nitrous-equipped Gen III Hemi engines. It excels in drag racing, muscle car restorations, marine applications, off-road vehicles, sandrails, pulling trucks, and street rods where induction system height is not restricted. Its modular design also appeals to fabricators and custom builders looking to create specialized induction setups.\u003c\/p\u003e","brand":"Holley EFI","offers":[{"title":"Default Title","offer_id":47315668009172,"sku":"300-658","price":1213.95,"currency_code":"USD","in_stock":true}]},{"product_id":"holley-efi-holley-gen-iii-hemi-hi-ram-efi-manifold-base-300-653","title":"Holley EFI Gen III Hemi Hi-Ram EFI Manifold Base: Fits Chrysler \/ Dodge \/ Jeep \/ Ram (05-20)","description":"\u003ch3\u003eHolley EFI Gen III Hemi Hi-Ram EFI Manifold Base\u003c\/h3\u003e\u003cp\u003e2005–2020 Chrysler \/ Dodge \/ Jeep \/ Ram Models with Gen III Hemi Engines\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003e300-653\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eOverview:\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eThe Holley EFI Gen III Hemi Hi-Ram EFI Manifold Base is engineered for high-performance enthusiasts seeking to maximize power on Chrysler, Dodge, Jeep, and Ram vehicles equipped with Gen III Hemi engines. Designed to fit a broad range of models from 2005 through 2020, this intake manifold base supports naturally aspirated, forced induction, and nitrous applications in engines ranging from 5.7 to over 7.2 liters. Its modular design allows for customization with various EFI tops, making it an ideal foundation for builders and fabricators aiming to create powerful, race-ready induction systems.\u003c\/p\u003e\u003cp\u003eWith large intake ports optimized for 2009-up 5.7L, 2005-2010 6.1L, and 2011-up 6.4L Gen III Hemi engines, the Hi-Ram manifold base delivers exceptional airflow and fuel delivery capabilities. Its aggressive styling complements muscle cars, drag racers, off-road vehicles, and street rods alike, making a bold statement under the hood while providing serious performance gains.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eKey Features:\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eThis Holley Hi-Ram EFI manifold base combines advanced engineering with practical features to enhance engine performance and reliability:\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eCompatible with Gen III Hemi engines featuring large intake ports (1.70” height x 1.88” wide)\u003c\/li\u003e\n\u003cli\u003eIncludes EFI fuel rails machined for -8AN O-ring fittings, designed for high fuel flow and pressure pulsation damping\u003c\/li\u003e\n\u003cli\u003ePort for OE style Manifold Absolute Pressure (MAP) sensor (1 or 2 Bar) for precise tuning\u003c\/li\u003e\n\u003cli\u003eModular manifold base designed to accept a wide range of EFI tops for custom induction setups\u003c\/li\u003e\n\u003cli\u003eLarge retained O-ring seals provide superior OE-style sealing and ease of maintenance\u003c\/li\u003e\n\u003cli\u003eRunner length and tapered cross-section optimized for a variety of engine configurations and RPM ranges (max power at 7500-8500 RPM)\u003c\/li\u003e\n\u003cli\u003eBillet oil fill cap with a low-profile, race-inspired design\u003c\/li\u003e\n\u003cli\u003eCast aluminum construction available in natural satin or black finish for durability and style\u003c\/li\u003e\n\u003cli\u003eCompatible with Gen III Hemi and Bosch EV-1 style fuel injectors\u003c\/li\u003e\n\u003cli\u003eCast-in pads for nitrous nozzle installation and positive crankcase ventilation (PVC) ports with adapter fittings\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eConstruction \u0026amp; Design:\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eCrafted from high-quality cast aluminum, the Holley Hi-Ram manifold base offers a robust yet lightweight solution engineered for performance and longevity. The satin or black finish not only enhances corrosion resistance but also adds a sleek, race-ready appearance. Its large intake ports and carefully designed runner geometry optimize airflow to support high RPM power delivery, while the modular base design provides flexibility for custom EFI configurations. The inclusion of large O-ring seals ensures a reliable, leak-free connection to the cylinder heads, maintaining consistent performance under demanding conditions.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eInstallation \u0026amp; Fitment:\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eThe Holley EFI Gen III Hemi Hi-Ram EFI Manifold Base is designed for direct fitment on a wide range of Chrysler, Dodge, Jeep, and Ram vehicles equipped with Gen III Hemi engines. Compatible models include Ram 1500, 2500, and 3500 (2011–2020), Chrysler 300 (2005–2020), Dodge Ram 1500, 2500, and 3500 (2009–2010), Dodge Challenger and Challenger SRT (2008–2020), Dodge Charger (2006–2020), Dodge Durango and Durango SRT (2009–2020), Dodge Magnum (2006–2008), and Jeep Grand Cherokee and Grand Cherokee SRT (2006–2020).\u003c\/p\u003e\u003cp\u003eInstallation typically requires standard intake manifold procedures and may involve tuning adjustments to optimize fuel delivery and ignition timing. The modular design allows builders to pair this base with various EFI tops, enabling custom setups tailored to specific performance goals.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat's Included:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eHolley EFI Gen III Hemi Hi-Ram EFI Manifold Base\u003c\/li\u003e\n\u003cli\u003eEFI fuel rails with -8 AN O-ring fittings\u003c\/li\u003e\n\u003cli\u003eBillet oil fill cap\u003c\/li\u003e\n\u003cli\u003eO-ring seals for cylinder head interface\u003c\/li\u003e\n\u003cli\u003eAdapter fittings for PVC ports\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eIdeal For:\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eThis manifold base is perfect for performance enthusiasts, racers, and custom builders working with Gen III Hemi engines who demand maximum airflow and fuel delivery for naturally aspirated, forced induction, or nitrous-boosted setups. It suits applications ranging from drag racing and muscle cars to marine, off-road, sandrails, pulling trucks, and street rods, offering versatility and power potential across a wide spectrum of high-performance builds.\u003c\/p\u003e","brand":"Holley EFI","offers":[{"title":"Default Title","offer_id":47315668041940,"sku":"300-653","price":874.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0660\/8542\/1268\/files\/3444_50d5171054fbe2a72b3cf35a7940c0e2a55b02f7_b354cc0b-f96a-469b-bf7e-8f23e5538390.webp?v=1766655096"},{"product_id":"holley-efi-holley-gen-iii-hemi-hi-ram-efi-manifold-300-658bk","title":"Holley EFI Gen III Hemi Hi-Ram EFI Manifold: 5.7L (2009+) \/ 6.1L (05-10) \/ 6.4L (2011+) - Black","description":"\u003ch3\u003eHolley EFI Gen III Hemi Hi-Ram EFI Manifold\u003c\/h3\u003e\u003cp\u003e2005–2010 Dodge 6.1L \/ 2009+ Dodge 5.7L \/ 2011+ Dodge 6.4L Gen III Hemi Engines\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003e300-658BK\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eOverview:\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eThe Holley EFI Gen III Hemi Hi-Ram EFI Manifold is a high-performance intake solution designed specifically for Dodge Gen III Hemi engines ranging from 5.7L to 6.4L. Engineered to maximize airflow and fuel delivery, this cast aluminum manifold features large intake ports and a modular base that supports a variety of EFI tops, making it an ideal foundation for custom induction setups. Whether you’re building a naturally aspirated, forced induction, or nitrous-assisted engine, the Hi-Ram manifold delivers exceptional power potential at high RPMs, making it perfect for muscle cars, drag racing, marine, off-road, and street rod applications.\u003c\/p\u003e\u003cp\u003eIts bold, race-inspired styling not only enhances engine bay aesthetics but also signals serious performance intent. Designed for engines operating up to 7.2+ liters and optimized for peak power between 7,500 and 8,500 RPM, this manifold is a versatile upgrade for enthusiasts seeking to unlock the full potential of their Gen III Hemi powerplants.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eKey Features:\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eBuilt with precision and performance in mind, the Holley Hi-Ram EFI manifold offers a range of advanced features:\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eCast-in pads for easy installation of nitrous nozzles, supporting nitrous oxide applications\u003c\/li\u003e\n\u003cli\u003eBillet oil fill cap with a sleek, low-profile design for a clean engine appearance\u003c\/li\u003e\n\u003cli\u003eCompatibility with Gen III Hemi injectors and Bosch EV-1 style fuel injectors for flexible fuel delivery options\u003c\/li\u003e\n\u003cli\u003ePort for OE-style manifold absolute pressure (MAP) sensors (1 or 2 bar) to support accurate EFI tuning\u003c\/li\u003e\n\u003cli\u003eRunner length and tapered cross-section optimized for a wide range of engine configurations and performance goals\u003c\/li\u003e\n\u003cli\u003eDesigned to fit Gen III Hemi engines with large intake ports measuring 1.70” height by 1.88” width\u003c\/li\u003e\n\u003cli\u003eO-ring seal to cylinder head with large retained O-rings for superior OE-style sealing and easy maintenance\u003c\/li\u003e\n\u003cli\u003eModular manifold base available separately for custom induction system builds\u003c\/li\u003e\n\u003cli\u003ePositive crankcase ventilation (PCV) ports with adapter fittings for proper crankcase venting\u003c\/li\u003e\n\u003cli\u003eIncludes EFI fuel rails machined for -8 AN O-ring fittings with large passages to support high fuel flow and reduce pressure pulsations\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eConstruction \u0026amp; Design:\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eThe Hi-Ram manifold is crafted from durable cast aluminum, available in a natural satin or black finish to suit your build’s aesthetic. Its robust construction ensures long-lasting reliability under demanding conditions. The design incorporates large intake ports and a tapered runner cross-section to optimize airflow velocity and volume, enhancing volumetric efficiency across a broad RPM range. The modular base allows fabricators and builders to customize the induction system by pairing it with various EFI tops, making it a versatile platform for both street and race applications.\u003c\/p\u003e\u003cp\u003ePerformance \u0026amp; Sound\u003c\/p\u003e\u003cp\u003eBy increasing intake airflow and improving fuel atomization, the Holley Hi-Ram manifold significantly enhances engine breathing, enabling higher horsepower and torque outputs at elevated RPMs. This manifold is engineered to support maximum power production in the 7,500 to 8,500 RPM range, making it ideal for high-revving naturally aspirated engines as well as boosted or nitrous setups. The aggressive intake design also contributes to a more pronounced induction sound, adding to the overall performance character of your Gen III Hemi.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eInstallation \u0026amp; Fitment:\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eThis manifold is designed to bolt directly onto 2009 and newer 5.7L, 2005 to 2010 6.1L, and 2011 and newer 6.4L Gen III Hemi engines with large intake ports. Installation requires no major modifications, and the included O-ring seals provide a reliable, leak-free connection to the cylinder heads. The manifold’s modular design allows for easy integration with existing EFI systems and supports a variety of fuel injector types and sensor configurations. Professional installation is recommended to ensure optimal performance and proper tuning.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat's Included:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eHolley Hi-Ram EFI intake manifold (black finish)\u003c\/li\u003e\n\u003cli\u003eEFI fuel rails with -8 AN O-ring fittings\u003c\/li\u003e\n\u003cli\u003eBillet oil fill cap\u003c\/li\u003e\n\u003cli\u003eO-ring seals for cylinder head mounting\u003c\/li\u003e\n\u003cli\u003ePCV adapter fittings\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eIdeal For:\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eThis manifold is perfect for performance enthusiasts and professional builders seeking to maximize power on Gen III Hemi engines in muscle cars, drag racers, marine vessels, off-road vehicles, sandrails, pulling trucks, and street rods. It excels in naturally aspirated, forced induction, and nitrous applications, especially where engine bay height is not a limiting factor. If you want a race-bred, aggressive intake manifold that delivers both style and substance, the Holley Hi-Ram EFI manifold is an excellent choice.\u003c\/p\u003e","brand":"Holley EFI","offers":[{"title":"Default Title","offer_id":47315668074708,"sku":"300-658BK","price":1393.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0660\/8542\/1268\/files\/0002400_110cf59545933d60d23f5e411936b7d83d31a4c9_105b4101-ad8a-43ff-87df-8db5a8eba940.webp?v=1771667087"},{"product_id":"holley-efi-holley-gen-iii-hemi-hi-ram-efi-manifold-base-300-653bk","title":"Holley EFI Gen III Hemi Hi-Ram EFI Manifold Base: Fits Dodge \/ Chrysler \/ Jeep \/ Ram (05-26) - Black","description":"\u003ch3\u003eHolley EFI Gen III Hemi Hi-Ram EFI Manifold Base\u003c\/h3\u003e\u003cp\u003e2005–2020 Chrysler 300, 2006–2020 Dodge Charger, Challenger, Durango, Magnum, Jeep Grand Cherokee, 2009–2020 Ram 1500 \/ 2500 \/ 3500\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003e300-653BK\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eOverview:\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eThe Holley EFI Gen III Hemi Hi-Ram EFI Manifold Base is engineered for high-performance Gen III Hemi engines ranging from 5.7 to over 7.2 liters. Designed to maximize power output at high RPMs (7500-8500), this intake manifold base is ideal for naturally aspirated, forced induction, and nitrous applications. Its modular design allows builders and fabricators to customize induction systems by pairing the base with a variety of EFI tops, making it a versatile foundation for muscle cars, trucks, off-road vehicles, and more.\u003c\/p\u003e\u003cp\u003eCompatible with a broad range of popular vehicles including Ram 1500, 2500, 3500 (2009–2020), Chrysler 300 (2005–2020), Dodge Challenger, Charger, Durango, Magnum, and Jeep Grand Cherokee, this manifold base is built to unlock the full potential of your Gen III Hemi engine.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eKey Features:\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eDesigned with performance and versatility in mind, the Holley Hi-Ram EFI Manifold Base offers numerous advanced features:\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eEFI fuel rails machined for -8AN O-ring fittings with large passages to support high fuel flow and reduce pressure pulsations\u003c\/li\u003e\n\u003cli\u003ePositive Crankcase Ventilation (PCV) ports with adapter fittings for proper crankcase breathing\u003c\/li\u003e\n\u003cli\u003eLarge intake ports (1.70” height x 1.88” width) compatible with 2009+ 5.7L, 2005–2010 6.1L, and 2011+ 6.4L Gen III Hemi engines\u003c\/li\u003e\n\u003cli\u003eRunner length and tapered cross-section optimized for a wide range of engine configurations and induction setups\u003c\/li\u003e\n\u003cli\u003ePort for OE-style Manifold Absolute Pressure (MAP) sensor (1 or 2 bar)\u003c\/li\u003e\n\u003cli\u003eCast aluminum construction available in natural satin or black finish\u003c\/li\u003e\n\u003cli\u003eCompatibility with Gen III Hemi injectors and Bosch EV-1 style injectors\u003c\/li\u003e\n\u003cli\u003eBillet oil fill cap with a sleek, low-profile design\u003c\/li\u003e\n\u003cli\u003eCast-in pads for easy addition of nitrous nozzles\u003c\/li\u003e\n\u003cli\u003eLarge retained O-ring seals for superior OE-style sealing and easy replacement\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eConstruction \u0026amp; Design:\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eThe Holley Hi-Ram manifold base is crafted from high-quality cast aluminum, ensuring durability and excellent heat dissipation. Its robust construction supports aggressive driving conditions and high-performance demands. The design features large intake ports and tapered runners that optimize airflow velocity and volume, enhancing engine breathing and power delivery across a broad RPM range. The modular base allows for customization, making it an excellent choice for builders seeking to tailor induction systems to specific performance goals.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eInstallation \u0026amp; Fitment:\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eThis manifold base is designed to fit a wide range of Gen III Hemi engines, including 5.7L, 6.1L, and 6.4L variants found in numerous Dodge, Chrysler, Jeep, and Ram models from 2005 through 2020. Installation requires standard intake manifold procedures and is compatible with factory-style fuel injectors and EFI components. The O-ring seal system simplifies installation and maintenance by providing reliable, leak-free sealing that is easy to service.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat's Included:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eHolley EFI Gen III Hemi Hi-Ram EFI Manifold Base\u003c\/li\u003e\n\u003cli\u003eEFI fuel rails with -8AN O-ring fittings\u003c\/li\u003e\n\u003cli\u003eBillet oil fill cap\u003c\/li\u003e\n\u003cli\u003eAdapter fittings for PCV ports\u003c\/li\u003e\n\u003cli\u003eCast-in nitrous nozzle pads\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eIdeal For:\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eThis manifold base is perfect for enthusiasts and professional builders aiming to maximize power on Gen III Hemi engines in muscle cars, drag racers, street rods, marine applications, off-road vehicles, sandrails, and pulling trucks. Its high-flow design and modularity make it suitable for naturally aspirated setups as well as forced induction and nitrous-boosted engines, providing flexibility for a wide range of high-performance builds.\u003c\/p\u003e","brand":"Holley EFI","offers":[{"title":"Default Title","offer_id":47315668107476,"sku":"300-653BK","price":898.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0660\/8542\/1268\/files\/3446_4d1dcfa116a608560fd446bc0f59c186b8e1827c_c9c5dea8-cbae-41d5-b3e8-4ed4daba56ba.webp?v=1766655096"},{"product_id":"holley-efi-gen-iii-hemi-drive-by-wire-harness-early-pedal-558-417be","title":"Holley EFI Gen III HEMI Drive-By-Wire Harness: Chrysler 300 (05-15) \/ Dodge Ram 1500 (03-10) - Black","description":"\u003ch3\u003eHolley EFI Drive-By-Wire Harness\u003c\/h3\u003e\u003cp\u003e2005–2007 Dodge \/ Chrysler Gen III HEMI Early Pedal Type\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003e558-417\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eOverview:\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eThe Holley EFI Gen III HEMI Drive-By-Wire Harness is engineered specifically for early pedal type throttle systems found on 2005 to 2007 Dodge and Chrysler vehicles equipped with the Gen III HEMI engine. This harness enables precise control of fuel and spark through Holley EFI, making it an essential upgrade for enthusiasts performing power upgrades or engine swaps. Designed to integrate seamlessly with the factory throttle body connector, it supports advanced tuning capabilities for modern performance applications.\u003c\/p\u003e\u003cp\u003eWhether you’re adding power adders like nitrous, superchargers, or turbochargers, or incorporating methanol and water injection, this harness provides the foundation for sophisticated engine management. It is ideal for anyone seeking to unlock the full potential of their Gen III HEMI with reliable, OEM-grade connections and durable construction.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eKey Features:\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eThis harness offers a range of features tailored to the Gen III HEMI platform, ensuring optimal performance and ease of use:\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eDesigned specifically for early pedal type drive-by-wire throttle systems on Gen III HEMI engines\u003c\/li\u003e\n\u003cli\u003eEnables full control of fuel and spark via Holley EFI for precise tuning\u003c\/li\u003e\n\u003cli\u003eCompatible with power adders including nitrous oxide, superchargers, turbos, and supports methanol\/water injection\u003c\/li\u003e\n\u003cli\u003eUses TXL grade copper wiring for minimal weight and high-temperature resistance\u003c\/li\u003e\n\u003cli\u003eFactory-style terminations ensure strong, secure connections\u003c\/li\u003e\n\u003cli\u003eOEM-grade connectors provide a correct, positive fit with factory components\u003c\/li\u003e\n\u003cli\u003eWiring routed through split-loom braid for enhanced protection and clean appearance\u003c\/li\u003e\n\u003cli\u003eMaintains compatibility with the consistent throttle body connector across Gen III HEMI engines\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eConstruction \u0026amp; Design:\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eThe Holley EFI Drive-By-Wire Harness is built with durability and precision in mind. Utilizing TXL grade copper wiring, it offers excellent conductivity while minimizing weight and bulk. The wiring is protected by a high-temperature sleeve and routed through a split-loom braid, providing resistance against heat, abrasion, and environmental factors. Every connector and termination is designed to meet or exceed OEM standards, ensuring a secure, reliable connection that fits perfectly with the Gen III HEMI’s early pedal type throttle system.\u003c\/p\u003e\u003cp\u003eThis attention to detail in materials and engineering guarantees long-lasting performance even in demanding engine bay conditions.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eInstallation \u0026amp; Fitment:\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eInstallation is straightforward for vehicles equipped with the early pedal type drive-by-wire throttle system on Gen III HEMI engines from 2005 through 2007. The harness plugs directly into the factory throttle pedal connector, which features a larger connector design unique to early models. No modifications are required to the throttle body connector, as it remains consistent across all Gen III HEMI engines. This plug-and-play design simplifies integration with Holley EFI systems, making it an ideal choice for engine swaps and performance upgrades.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat's Included:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\u003cli\u003eHolley EFI Gen III HEMI Drive-By-Wire Harness for early pedal type throttle systems\u003c\/li\u003e\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eIdeal For:\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eThis harness is perfect for automotive enthusiasts, professional tuners, and engine builders working with early Gen III HEMI engines who want to leverage Holley EFI’s advanced fuel and spark control. It is especially suited for those performing power upgrades, engine swaps, or integrating forced induction and other power adders requiring precise electronic throttle control.\u003c\/p\u003e","brand":"Holley EFI","offers":[{"title":"Default Title","offer_id":47315668140244,"sku":"558-417","price":247.45,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0660\/8542\/1268\/files\/3447_a1d7e73e9380b9d4e8b5373a62347407c0f42f42_1a975193-0c7e-47c2-a853-af53d31ad999.webp?v=1766655095"},{"product_id":"holley-efi-gen-iii-hemi-drive-by-wire-harness-late-pedal-558-418be","title":"Holley EFI Gen III HEMI Drive-By-Wire Harness: Chrysler 300 (05-15) \/ Dodge Ram 1500 (03-10)","description":"\u003ch3\u003eHolley EFI Drive-By-Wire Harness\u003c\/h3\u003e\u003cp\u003e2007–Present Gen III HEMI Engines - Late Pedal\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003e558-418\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eOverview:\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eThe Holley EFI Gen III HEMI Drive-By-Wire Harness is engineered specifically for late-model Gen III HEMI engines featuring the updated throttle pedal connector introduced in 2007 for trucks and 2008 for cars. This harness enables precise control of fuel and spark through Holley EFI systems, making it an essential upgrade for enthusiasts looking to optimize engine performance, whether for power upgrades, engine swaps, or advanced tuning applications.\u003c\/p\u003e\u003cp\u003eDesigned to seamlessly integrate with the Gen III HEMI platform, this harness supports modern drive-by-wire throttle systems, ensuring compatibility with the latest pedal connectors while maintaining the factory throttle body connection. It is ideal for those seeking the most advanced fuel and timing control capabilities available for their Gen III HEMI-powered vehicle.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eKey Features:\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eBuilt to deliver reliable and efficient engine management, the Holley EFI Drive-By-Wire Harness offers the following key features:\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eDesigned specifically for Gen III HEMI engines with late-model drive-by-wire throttle pedal connectors\u003c\/li\u003e\n\u003cli\u003eEnables full control of fuel and spark via Holley EFI for precise tuning and performance gains\u003c\/li\u003e\n\u003cli\u003eCompatible with power adders including nitrous oxide, superchargers, turbos, as well as methanol and water injection systems\u003c\/li\u003e\n\u003cli\u003eUtilizes TXL grade copper wiring for minimal weight and high-temperature resistance\u003c\/li\u003e\n\u003cli\u003eFactory-style terminations ensure strong, secure, and reliable electrical connections\u003c\/li\u003e\n\u003cli\u003eOEM-grade connectors provide a correct, positive fit for seamless integration\u003c\/li\u003e\n\u003cli\u003eHarness is routed through a split-loom braid for enhanced protection and a clean, professional appearance\u003c\/li\u003e\n\u003cli\u003eMaintains consistent throttle body connector design across all Gen III HEMI engines for simplified installation\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eConstruction \u0026amp; Design:\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eThe harness is constructed using high-quality TXL grade copper wiring, known for its excellent conductivity and resistance to heat and abrasion. The wiring is encased in a high-temperature sleeve with a small diameter to reduce weight and bulk, making routing easier and cleaner under the hood. Each connector is manufactured to OEM specifications, ensuring a precise fit and reliable connection that meets or exceeds factory standards.\u003c\/p\u003e\u003cp\u003eTo protect against wear and environmental damage, the entire harness is routed through a durable split-loom braid. This not only safeguards the wiring from heat, moisture, and mechanical abrasion but also provides a professional, factory-like appearance that complements the engine bay.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eInstallation \u0026amp; Fitment:\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eInstallation is straightforward for vehicles equipped with Gen III HEMI engines featuring the late-model drive-by-wire pedal connector introduced in 2007 (trucks) and 2008 (cars). The harness plugs directly into the existing engine and pedal connectors without the need for splicing or modifications. Because the throttle body connector remains consistent across all Gen III HEMI engines, this harness simplifies integration with your Holley EFI system.\u003c\/p\u003e\u003cp\u003eIt is recommended to verify the pedal connector type on your vehicle to ensure compatibility, as early Gen III HEMI models use a larger pedal connector that is not compatible with this harness.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat's Included:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eHolley EFI Gen III HEMI Drive-By-Wire Harness with late pedal connector\u003c\/li\u003e\n\u003cli\u003eSplit-loom protective braid covering the entire harness length\u003c\/li\u003e\n\u003cli\u003eOEM-grade connectors and factory-style terminations\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eIdeal For:\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eThis harness is ideal for performance enthusiasts, engine builders, and tuners who are upgrading or swapping Gen III HEMI engines and require advanced electronic fuel injection control. It is especially suited for those running power adders such as nitrous, forced induction, or water\/methanol injection, and anyone seeking a reliable, OEM-quality wiring solution for their Holley EFI system.\u003c\/p\u003e","brand":"Holley EFI","offers":[{"title":"Default Title","offer_id":47315668173012,"sku":"558-418","price":230.35,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0660\/8542\/1268\/files\/3448_72db2730738af668ba4a0d12dd06be99b4e2e674_a6c35e8a-2eed-4457-96c7-795e2af6c10e.webp?v=1766655094"},{"product_id":"holley-efi-chrysler-hemi-drive-by-wire-dual-throttle-body-harness-558-450be","title":"Holley EFI Drive-By-Wire Dual Throttle Body Harness: Chrysler 300 (05-15) \/ Dodge Ram 1500 (03-10)","description":"\u003ch3\u003eHolley EFI Drive-By-Wire Dual Throttle Body Harness\u003c\/h3\u003e\u003cp\u003eChrysler HEMI Engines\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003e558-450\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eOverview:\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eThe Holley EFI Drive-By-Wire Dual Throttle Body Harness is engineered specifically for Chrysler HEMI engines equipped with dual drive-by-wire throttle bodies. Designed to integrate seamlessly with the Holley EFI Dominator ECU, this harness enables precise electronic control of dual OEM throttle bodies (P\/N 53034251AB), delivering smooth throttle response and enhanced drivability. This product is ideal for enthusiasts and professional tuners looking to upgrade or retrofit their EFI system with advanced drive-by-wire capability.\u003c\/p\u003e\u003cp\u003eTo complete the installation, the harness requires the compatible pedal assembly, part number 0486 1714, ensuring full system compatibility and optimal performance. This harness simplifies wiring complexity and provides a reliable connection between the ECU and throttle bodies, making it an essential component for modern EFI setups on Chrysler HEMI platforms.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eKey Features:\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eDesigned with precision and reliability in mind, the Holley EFI Drive-By-Wire Dual Throttle Body Harness offers the following key features:\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eDirect compatibility with Holley EFI Dominator ECU for seamless integration\u003c\/li\u003e\n\u003cli\u003eSupports dual drive-by-wire throttle bodies, OEM part number 53034251AB\u003c\/li\u003e\n\u003cli\u003eRequires Holley pedal assembly part number 0486 1714 for complete system functionality\u003c\/li\u003e\n\u003cli\u003eHigh-quality connectors and wiring for dependable signal transmission\u003c\/li\u003e\n\u003cli\u003eEngineered specifically for Chrysler HEMI engines to ensure perfect fit and operation\u003c\/li\u003e\n\u003cli\u003eReduces installation time by providing a plug-and-play wiring solution\u003c\/li\u003e\n\u003cli\u003eFacilitates precise throttle control and improved engine management\u003c\/li\u003e\n\u003cli\u003eDurable construction designed to withstand automotive environments\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eConstruction \u0026amp; Design:\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eThe harness is constructed using automotive-grade wiring and connectors that resist heat, vibration, and corrosion, ensuring long-lasting durability under the hood. Each connection is engineered to maintain signal integrity for accurate throttle position feedback to the ECU. The design focuses on ease of installation, with color-coded and keyed connectors that prevent miswiring and simplify the setup process. This robust construction supports the demanding electrical requirements of modern drive-by-wire throttle systems.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eInstallation \u0026amp; Fitment:\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eInstallation of the Holley EFI Drive-By-Wire Dual Throttle Body Harness is straightforward when paired with the Holley EFI Dominator ECU and the specified pedal assembly (part number 0486 1714). The harness is designed to plug directly into the dual OEM throttle bodies (P\/N 53034251AB) found on Chrysler HEMI engines, minimizing the need for custom wiring or modifications. This plug-and-play approach reduces installation time and potential errors, making it suitable for both professional installers and experienced enthusiasts.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat's Included:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\u003cli\u003eHolley EFI Drive-By-Wire Dual Throttle Body Harness (SKU 558-450)\u003c\/li\u003e\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eIdeal For:\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eThis harness is ideal for automotive enthusiasts, professional tuners, and custom builders who are upgrading or converting their Chrysler HEMI engine setups to utilize dual drive-by-wire throttle bodies with Holley EFI systems. It is especially suited for those seeking precise electronic throttle control and improved engine management capabilities in performance or street applications.\u003c\/p\u003e","brand":"Holley EFI","offers":[{"title":"Default Title","offer_id":47315668205780,"sku":"558-450","price":340.15,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0660\/8542\/1268\/files\/0002399_a1ef18c0d3f0f1f11d22556457d815f92c585741_fb0b3942-7fb6-47a2-a3b5-47ed53783c90.webp?v=1771667087"},{"product_id":"holley-efi-gen-iii-hemi-main-harness-early-w-tps-and-idle-air-control-connections-558-115be","title":"Holley EFI Gen III HEMI Main Harness w\/ TPS \u0026 IAC: Chrysler 300 \/ Dodge Ram 1500 (03-15 \/ 03-10)","description":"\u003ch3\u003eHolley EFI Gen III HEMI Main Harness\u003c\/h3\u003e\u003cp\u003eGen III HEMI Engine with Aftermarket Cable Actuated Throttle Body\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003e558-115\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eOverview:\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eThe Holley EFI Gen III HEMI Main Harness is a precision-engineered wiring solution designed specifically for Gen III HEMI engines equipped with aftermarket cable actuated throttle bodies. This harness serves as the critical interface between your Holley EFI ECU and the engine, enabling seamless control of fuel delivery and ignition timing. Ideal for enthusiasts performing engine swaps or power upgrades, it supports advanced tuning capabilities including power adders like nitrous, superchargers, and turbochargers, as well as compatibility with methanol and water injection systems.\u003c\/p\u003e\u003cp\u003eBy utilizing most factory sensors, this harness ensures reliable and accurate data transmission while simplifying installation. It is intended to be used alongside Holley EFI injector and coil harnesses, plus two ignition modules, to deliver the most sophisticated fuel and spark management available for the Gen III HEMI platform.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eKey Features:\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eDesigned with performance and reliability in mind, the Holley EFI Gen III HEMI Main Harness offers the following key features:\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eDedicated wiring and connectors for Idle Air Control (IAC) motor and Throttle Position Sensor (TPS) tailored for manual throttle body applications\u003c\/li\u003e\n\u003cli\u003eEnables full control of fuel and spark timing through Holley EFI for enhanced engine performance and tuning flexibility\u003c\/li\u003e\n\u003cli\u003eSupports advanced power adders including nitrous oxide, superchargers, turbochargers, and is compatible with methanol and water injection setups\u003c\/li\u003e\n\u003cli\u003eOEM-grade connectors ensure secure, positive fitment and reliable electrical connections\u003c\/li\u003e\n\u003cli\u003eTXL grade copper wiring offers minimal weight and high temperature resistance with a compact diameter for clean routing\u003c\/li\u003e\n\u003cli\u003eFactory-style terminations provide strong, durable connections that withstand engine bay conditions\u003c\/li\u003e\n\u003cli\u003eSplit-loom braided routing protects wiring from abrasion and heat while maintaining a professional appearance\u003c\/li\u003e\n\u003cli\u003eIncludes two optional connectors for integration with CAN-based Holley modules, expanding system capabilities\u003c\/li\u003e\n\u003cli\u003eSpecifically engineered to fit and function perfectly with the Gen III HEMI engine platform\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eConstruction \u0026amp; Design:\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eThe harness is constructed using high-quality TXL grade copper wiring, known for its excellent conductivity and resistance to heat and corrosion. The wiring is encased in a high-temperature sleeve with a small diameter, reducing bulk and simplifying installation in tight engine compartments. Holley EFI employs OEM-grade connectors and factory-style terminations to ensure a secure, vibration-resistant connection that maintains signal integrity under demanding conditions. The entire harness is routed through a split-loom braid, providing additional protection against abrasion and heat while delivering a clean, professional look.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eInstallation \u0026amp; Fitment:\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eThis main harness is designed for straightforward installation on Gen III HEMI engines equipped with aftermarket cable actuated throttle bodies. It requires pairing with Holley EFI injector and coil harnesses as well as two ignition modules to complete the EFI system. Most factory sensors are retained, minimizing the need for additional modifications or sensor replacements. The harness’s OEM-grade connectors and precise fitment reduce installation time and potential wiring errors, making it suitable for both professional shops and experienced enthusiasts.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat's Included:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eHolley EFI Gen III HEMI Main Harness with IAC motor and TPS connectors\u003c\/li\u003e\n\u003cli\u003eTwo optional CAN-based Holley module connectors\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eIdeal For:\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eThis harness is ideal for automotive enthusiasts and professional tuners upgrading or swapping Gen III HEMI engines with aftermarket cable actuated throttle bodies. It is perfect for those seeking advanced EFI control for fuel and spark management, especially when incorporating power adders such as nitrous, superchargers, or turbochargers. 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This harness serves as the critical interface between your Holley EFI ECU and the engine, enabling full control over fuel delivery and ignition timing. Ideal for enthusiasts performing engine swaps or power upgrades, it supports advanced tuning capabilities including power adders such as nitrous oxide, superchargers, and turbochargers, as well as compatibility with methanol and water injection systems.\u003c\/p\u003e\u003cp\u003eBy utilizing most of the stock sensors, this harness simplifies installation while delivering the most advanced fuel and spark control available for Gen III HEMI platforms. It is intended to be used alongside Holley EFI injector and coil harnesses, plus two ignition modules, to create a complete EFI wiring solution.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eKey Features:\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eDesigned with performance and reliability in mind, the Holley EFI Gen III HEMI Main Harness offers a range of features that make it the ideal choice for modern EFI conversions and upgrades:\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eComplete Gen III HEMI main harness with integrated Idle Air Control (IAC) motor and Throttle Position Sensor (TPS) wiring\/connectors\u003c\/li\u003e\n\u003cli\u003eEnables precise fuel and spark control through Holley EFI for enhanced engine performance\u003c\/li\u003e\n\u003cli\u003eSupports tuning with power adders including nitrous, superchargers, turbos, and compatible with methanol and water injection\u003c\/li\u003e\n\u003cli\u003eDesigned specifically for Gen III HEMI engines to ensure perfect fit and function\u003c\/li\u003e\n\u003cli\u003eUtilizes most factory sensors to maintain OEM-like operation and simplify installation\u003c\/li\u003e\n\u003cli\u003eIncludes two optional connectors for CAN-based Holley modules, expanding system integration possibilities\u003c\/li\u003e\n\u003cli\u003eConstructed with lightweight, high-temperature TXL grade copper wiring for durability and minimal weight\u003c\/li\u003e\n\u003cli\u003eFactory-style terminations and OEM-grade connectors provide secure, positive connections\u003c\/li\u003e\n\u003cli\u003eHarness routed through split-loom braid for superior protection and clean appearance\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eConstruction \u0026amp; Design:\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eThe Holley EFI Gen III HEMI Main Harness is built with high-quality TXL grade copper wiring, chosen for its excellent conductivity and resistance to heat. The wiring is sheathed in a high-temperature sleeve and routed through a split-loom braid, offering robust protection against abrasion and environmental damage while maintaining a neat, professional look under the hood. OEM-grade connectors and factory-style terminations ensure a secure, reliable connection that resists corrosion and vibration, critical for maintaining consistent engine management signals.\u003c\/p\u003e\u003cp\u003eEvery aspect of the harness is engineered to fit the Gen III HEMI engine platform precisely, reducing installation time and minimizing the need for modifications or splicing. This attention to detail guarantees a clean, factory-quality wiring solution that supports advanced EFI functionality.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eInstallation \u0026amp; Fitment:\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eThis main harness is designed for straightforward installation on Gen III HEMI engines with aftermarket cable-actuated throttle bodies. It is intended to be used in conjunction with Holley EFI injector and coil harnesses, as well as two ignition modules, to complete the EFI wiring system. Most stock sensors are compatible, which helps preserve OEM sensor functionality and reduces the complexity of the installation.\u003c\/p\u003e\u003cp\u003eWhile installation requires basic wiring knowledge and familiarity with EFI systems, the harness’s OEM-style connectors and dedicated wiring paths simplify the process. No major engine modifications are necessary, making this harness an excellent choice for engine swaps, rebuilds, or performance upgrades.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat's Included:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eHolley EFI Gen III HEMI Main Harness with TPS and Idle Air Control connectors\u003c\/li\u003e\n\u003cli\u003eTwo optional CAN-based Holley module connectors\u003c\/li\u003e\n\u003cli\u003eSplit-loom protective braid covering the entire harness\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eIdeal For:\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eThis harness is perfect for automotive enthusiasts, professional tuners, and engine builders who are upgrading or swapping Gen III HEMI engines and want to leverage the advanced capabilities of Holley EFI. It is especially suited for those adding power adders such as nitrous, superchargers, or turbochargers, or integrating methanol and water injection systems. Whether building a street performance vehicle or a race-ready machine, this harness provides the foundation for precise, reliable engine management.\u003c\/p\u003e","brand":"Holley EFI","offers":[{"title":"Default Title","offer_id":47315668271316,"sku":"558-116","price":736.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0660\/8542\/1268\/files\/3451_f7b3a92d59b770b229f2200959a2e1abba8d613c_dc63e8ad-73b3-4273-bbda-77ee9d65e5ca.webp?v=1766655094"},{"product_id":"holley-efi-gen-iii-hemi-v8-injector-harness-bosch-jetronic-and-holley-injectors-558-211be","title":"Holley EFI Gen III HEMI V8 Injector Harness: Chrysler 300 (05-15) \/ Dodge Ram 1500 (03-10)","description":"\u003ch3\u003eHolley EFI Injector Harness\u003c\/h3\u003e\u003cp\u003e2005–2010 Dodge \/ Chrysler \/ Jeep 5.7L, 6.1L, 6.4L Gen III HEMI V8\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003e558-211\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eOverview:\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eThe Holley EFI Gen III HEMI V8 Injector Harness is a precision-engineered wiring solution designed specifically for 5.7L (2009+), 6.1L (2005–2010), and 6.4L (2011+) Gen III HEMI engines. This harness is essential for anyone upgrading or swapping engines who wants to take full control of fuel injection and ignition timing through Holley EFI systems. Whether you are enhancing your vehicle with power adders like nitrous, superchargers, or turbochargers, or integrating methanol and water injection, this harness provides the reliable, OEM-quality connections needed for advanced tuning and performance optimization.\u003c\/p\u003e\u003cp\u003eHolley offers two types of injector harnesses: one with USCAR\/stock injector connectors for use with factory injectors, and another designed for Bosch and Holley (Jetronic\/Minitimer) style connectors commonly found in aftermarket larger injector setups. This versatility makes it ideal for a wide range of applications, from factory replacement to high-performance custom builds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eKey Features:\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eDesigned to deliver precise control and seamless integration with Gen III HEMI engines, this injector harness offers:\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eCompatibility with 5.7L (2009+), 6.1L (2005–2010), and 6.4L (2011+) Gen III HEMI V8 engines\u003c\/li\u003e\n\u003cli\u003eSupport for Holley EFI systems to control both fuel injection and spark timing\u003c\/li\u003e\n\u003cli\u003eTwo connector options: USCAR\/stock injector connectors and Bosch\/Holley aftermarket style connectors\u003c\/li\u003e\n\u003cli\u003eCapable of tuning with power adders including nitrous oxide, superchargers, turbos, and compatible with methanol and water injection\u003c\/li\u003e\n\u003cli\u003eTXL grade copper wiring for minimal weight and excellent conductivity\u003c\/li\u003e\n\u003cli\u003eHigh-temperature protective sleeve in a compact diameter for durability and neat installation\u003c\/li\u003e\n\u003cli\u003eFactory-style terminations ensuring strong, secure, and reliable connections\u003c\/li\u003e\n\u003cli\u003eOEM-grade connectors for a precise, positive fit to factory or aftermarket injectors\u003c\/li\u003e\n\u003cli\u003eHarness routed through split-loom braid for enhanced protection and professional appearance\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eConstruction \u0026amp; Design:\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eThe Holley EFI injector harness is built with high-quality TXL copper wiring, known for its excellent electrical conductivity and resistance to heat and abrasion. The wiring is encased in a high-temperature sleeve that protects against engine bay heat and mechanical wear while maintaining a slim profile for easy routing and installation. Connectors are manufactured to OEM specifications, ensuring a perfect fit with factory injectors or compatible aftermarket units. The entire harness is routed through a split-loom braid, which not only safeguards the wiring from damage but also provides a clean, professional look under the hood.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eInstallation \u0026amp; Fitment:\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eThis injector harness is designed for direct fitment on Gen III HEMI V8 engines, including 5.7L (2009+), 6.1L (2005–2010), and 6.4L (2011+) variants. Installation is straightforward, requiring no modifications when used with compatible injectors and Holley EFI systems. The harness plugs directly into the engine’s injector connectors and the Holley EFI controller, simplifying the wiring process and reducing installation time. Whether you are performing an engine swap or upgrading your fuel system, this harness ensures a reliable and professional connection.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat's Included:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eHolley EFI Gen III HEMI V8 Injector Harness with selected connector type (USCAR\/stock or Bosch\/Holley style)\u003c\/li\u003e\n\u003cli\u003eProtective split-loom braid covering\u003c\/li\u003e\n\u003cli\u003eOEM-grade connectors and factory-style terminations\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eIdeal For:\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eThis injector harness is ideal for automotive enthusiasts, professional tuners, and engine builders working with Gen III HEMI V8 engines who require precise fuel and spark control. It is perfect for those performing engine swaps, upgrading to Holley EFI systems, or installing power adders such as nitrous, superchargers, or turbochargers. Additionally, it suits applications involving methanol or water injection where reliable injector control is critical.\u003c\/p\u003e","brand":"Holley EFI","offers":[{"title":"Default Title","offer_id":47315668304084,"sku":"558-211","price":172.75,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0660\/8542\/1268\/files\/3452_a7a54feaed8e235515fac37e44e173a8765014b8_272bfae2-5ab7-45df-ae1b-509e9aba5edd.webp?v=1766655093"},{"product_id":"holley-efi-gen-iii-hemi-coil-harness-early-coils-558-310be","title":"Holley EFI Gen III HEMI Early Coil Harness: Chrysler 300 (05-15) \/ Dodge Ram 1500 (03-10)","description":"\u003ch3\u003eHolley EFI Gen III HEMI Early Coil Harness\u003c\/h3\u003e\u003cp\u003e2003–2018 Chrysler 5.7L \/ 6.1L \/ 6.4L HEMI Engines\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003e558-310\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eOverview:\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eThe Holley EFI Gen III HEMI Early Coil Harness is engineered specifically for Chrysler’s 5.7L, 6.1L, and 6.4L HEMI engines produced between 2003 and 2018. Designed to work with the early coil style that requires spark plug wires, this harness enables precise control over fuel and spark timing when paired with Holley EFI systems. Ideal for enthusiasts upgrading their Gen III HEMI engines or performing engine swaps, it provides the foundation for advanced tuning capabilities and enhanced engine management.\u003c\/p\u003e\u003cp\u003eThis harness is perfect for those seeking to maximize performance with power adders such as nitrous oxide, superchargers, or turbochargers, and it supports alternative fueling methods including methanol and water injection. With Holley EFI’s cutting-edge technology, users gain full command of their engine’s fuel delivery and ignition timing for optimized power and efficiency.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eKey Features:\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eBuilt to meet the demands of high-performance Gen III HEMI engines, this harness offers reliable connectivity and durability. Key features include:\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eDesigned specifically for early coil setups on 5.7L, 6.1L, and 6.4L Gen III HEMI engines (2003–2018)\u003c\/li\u003e\n\u003cli\u003eEnables full control of fuel and spark timing with Holley EFI systems\u003c\/li\u003e\n\u003cli\u003eCompatible with power adders such as nitrous, superchargers, and turbochargers\u003c\/li\u003e\n\u003cli\u003eSupports methanol and water injection tuning strategies\u003c\/li\u003e\n\u003cli\u003eTXL grade copper wiring for minimal weight and high-temperature resistance\u003c\/li\u003e\n\u003cli\u003eFactory-style terminations ensure secure, reliable connections\u003c\/li\u003e\n\u003cli\u003eOEM-grade connectors provide precise, positive fitment\u003c\/li\u003e\n\u003cli\u003eHarness routed through split-loom braid for protection and clean appearance\u003c\/li\u003e\n\u003cli\u003eSimple identification of coil type via plug wire requirement for easy installation\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eConstruction \u0026amp; Design:\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eThe harness is constructed using premium TXL grade copper wiring, known for its excellent conductivity and lightweight properties. This wiring is encased in a high-temperature sleeve with a small diameter to reduce bulk and improve routing flexibility within the engine bay. The use of factory-style terminations and OEM-grade connectors guarantees a secure, vibration-resistant connection that matches or exceeds factory standards.\u003c\/p\u003e\u003cp\u003eRouting through a split-loom braid not only protects the wiring from abrasion and heat but also delivers a professional, clean look that complements the engine bay. Every aspect of the harness is engineered to fit the Gen III HEMI engine platform precisely, ensuring a hassle-free installation and long-lasting performance.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eInstallation \u0026amp; Fitment:\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eThis harness is designed for direct fitment on Chrysler Gen III HEMI engines equipped with the early coil style, which requires spark plug wires. Identification is straightforward: if your coils require spark plug wires, this is the correct harness. Installation involves connecting the harness to the engine’s coil and ignition system, with no modifications necessary for compatible vehicles. This plug-and-play design simplifies upgrades and engine swaps while maintaining OEM-level reliability.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat's Included:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eHolley EFI Gen III HEMI Early Coil Harness (Part #558-310)\u003c\/li\u003e\n\u003cli\u003eOEM-grade connectors pre-installed\u003c\/li\u003e\n\u003cli\u003eSplit-loom protective braid covering the wiring\u003c\/li\u003e\n\u003cli\u003eDetailed installation instructions\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eIdeal For:\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eThis harness is ideal for automotive enthusiasts, professional tuners, and engine builders working with Chrysler Gen III HEMI engines from 2003 to 2018. It is especially suited for those upgrading to Holley EFI systems, performing engine swaps, or adding power enhancements such as forced induction or nitrous oxide. The harness provides the necessary wiring infrastructure to unlock advanced fuel and ignition control, enabling precise tuning and improved engine performance.\u003c\/p\u003e","brand":"Holley EFI","offers":[{"title":"Default Title","offer_id":47315668336852,"sku":"558-310","price":172.75,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0660\/8542\/1268\/files\/3453_96defc7d7eb6f1c498d3a08553027581674fc96c_9fc8dcfd-5de6-4db2-b97c-ed813838d9ab.webp?v=1766655092"},{"product_id":"holley-efi-gen-iii-hemi-coil-harness-late-coils-558-311be","title":"Holley EFI Gen III HEMI Coil Harness: Chrysler 300 (05-15) \/ Dodge Ram 1500 (03-10)","description":"\u003ch3\u003eHolley EFI Coil Harness\u003c\/h3\u003e\u003cp\u003e2006 and Later Chrysler Gen III HEMI Engines\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003e558-311\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eOverview:\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eThe Holley EFI Gen III HEMI Coil Harness is engineered specifically for late-model Gen III HEMI engines, providing a seamless connection for the advanced coil design introduced in 2006 and beyond. Chrysler’s Gen III HEMI engines transitioned from early coils requiring spark plug wires to a more modern coil design with integrated boots that connect directly to the spark plugs. This harness is tailored to support the later coil style, enabling precise control of fuel and spark through Holley EFI systems.\u003c\/p\u003e\u003cp\u003eDesigned for enthusiasts and professional tuners alike, this coil harness is ideal for those upgrading their Gen III HEMI with Holley EFI for enhanced engine management, whether for power upgrades, engine swaps, or forced induction applications. It delivers reliable, OEM-quality connections that ensure optimal performance and tuning flexibility.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eKey Features:\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eBuilt to complement Holley EFI’s advanced engine management capabilities, this coil harness offers numerous benefits for Gen III HEMI owners:\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eCompatible with late Gen III HEMI coil packs that connect directly to spark plugs without spark plug wires\u003c\/li\u003e\n\u003cli\u003eEnables full control of fuel and spark timing through Holley EFI for precise tuning\u003c\/li\u003e\n\u003cli\u003eSupports power adders such as nitrous oxide, superchargers, turbos, and is compatible with methanol and water injection systems\u003c\/li\u003e\n\u003cli\u003eConstructed with TXL grade copper wiring for minimal weight and high temperature resistance\u003c\/li\u003e\n\u003cli\u003eFactory-style terminations and OEM-grade connectors ensure secure, positive fitment and reliable electrical connections\u003c\/li\u003e\n\u003cli\u003eWiring is routed through a split-loom braid for enhanced protection and a clean, professional appearance\u003c\/li\u003e\n\u003cli\u003eDesigned specifically for the Gen III HEMI engine platform to guarantee proper fit and function\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eConstruction \u0026amp; Design:\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eThe Holley EFI coil harness is crafted with high-quality TXL copper wiring, known for its excellent conductivity and resistance to heat and abrasion. The wiring is sheathed in a durable high-temperature sleeve and routed through a split-loom braid, providing robust protection against engine bay hazards while maintaining a sleek, factory-like look. Each connector is OEM-grade, ensuring a precise fit that matches factory specifications, which minimizes installation issues and maximizes reliability.\u003c\/p\u003e\u003cp\u003eEvery aspect of the harness is engineered to meet the demanding environment of the Gen III HEMI engine bay, delivering long-lasting performance and durability under high heat and vibration conditions.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eInstallation \u0026amp; Fitment:\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eThis coil harness is designed for direct fitment on late Gen III HEMI engines equipped with the coil packs introduced in 2006 and later. Installation is straightforward, requiring no modifications to the engine or ignition system. The harness plugs directly into the factory coil connectors and spark plugs, simplifying the upgrade process for Holley EFI users.\u003c\/p\u003e\u003cp\u003eIt is essential to verify that your engine uses the late coil design without spark plug wires before purchasing. Reference the included image gallery to distinguish between early and late coil types to ensure compatibility.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat's Included:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eHolley EFI Gen III HEMI Coil Harness for late coil packs\u003c\/li\u003e\n\u003cli\u003eOEM-grade connectors pre-installed\u003c\/li\u003e\n\u003cli\u003eSplit-loom protective braid covering the wiring\u003c\/li\u003e\n\u003cli\u003eInstallation instructions and reference images\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eIdeal For:\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eThis coil harness is perfect for Gen III HEMI owners looking to upgrade their ignition system with Holley EFI for improved tuning capabilities. It suits performance enthusiasts performing engine swaps, forced induction upgrades, or those seeking precise control over fuel and spark timing. Professional tuners and DIY builders alike will benefit from its plug-and-play design and robust construction.\u003c\/p\u003e","brand":"Holley EFI","offers":[{"title":"Default Title","offer_id":47315668369620,"sku":"558-311","price":179.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0660\/8542\/1268\/files\/3454_a480197708658eadf36649df3734b1ee4e80c8a2_2e9636aa-a439-4333-93ab-b9c6679e3e7e.webp?v=1766655092"},{"product_id":"holley-efi-terminator-x-2003-2006-hemi-gen-iii-kit-550-1223","title":"Holley EFI Terminator X Gen III HEMI EFI Kit: Chrysler 300 \/ Dodge Ram 1500 (03-15)","description":"\u003ch3\u003eHolley EFI Terminator X Gen III HEMI EFI Kit\u003c\/h3\u003e\u003cp\u003e2005–2010 Chrysler 5.7L \/ 6.1L and 2011+ Chrysler 6.4L Gen III HEMI Engines (Non-VVT)\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003e550-1223\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eOverview:\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eThe Holley EFI Terminator X Gen III HEMI EFI Kit is a comprehensive engine management solution designed specifically for Chrysler Gen III HEMI engines produced between 2003 and 2013+, including the 5.7L, 6.1L, and 6.4L variants without variable valve timing (VVT). This plug-and-play system offers enthusiasts and professional tuners alike an accessible, powerful platform to optimize fuel delivery, ignition timing, and boost control for naturally aspirated or boosted applications.\u003c\/p\u003e\u003cp\u003eEquipped with advanced features such as real-time fuel learning and high impedance injector drivers, the Terminator X ECU simplifies the tuning process while delivering precise engine control. Whether you’re building a street cruiser, weekend track car, or a serious race machine, this kit provides the technology and support needed to maximize performance without breaking the bank.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eKey Features:\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eThe Terminator X EFI kit is packed with versatile features engineered to enhance engine management and tuning flexibility:\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003ePlug-and-play compatibility for Chrysler Gen III HEMI engines (2003–2013+), including 5.7L, 6.1L, and 6.4L (non-VVT only)\u003c\/li\u003e\n\u003cli\u003eHigh impedance injector drivers supporting Holley EFI and most stock injectors (EV1 or EV6 injector harness included)\u003c\/li\u003e\n\u003cli\u003eIntegrated 1 bar MAP sensor with external MAP sensor support for boosted applications\u003c\/li\u003e\n\u003cli\u003eFour programmable inputs and outputs for electric fans, boost control solenoids, nitrous activation, and more\u003c\/li\u003e\n\u003cli\u003eIncluded Bosch LSU 4.9 wideband O2 sensors for accurate air\/fuel ratio monitoring and closed-loop tuning\u003c\/li\u003e\n\u003cli\u003eAdvanced boost control options including boost vs. time, gear, RPM, speed, and built-in boost safeties\u003c\/li\u003e\n\u003cli\u003eNitrous control channels supporting wet or dry, progressive or non-progressive setups with rich\/lean safeties\u003c\/li\u003e\n\u003cli\u003eMultiple advanced tuning tables (1D and 2D) for nearly unlimited calibration flexibility\u003c\/li\u003e\n\u003cli\u003eOn-board diagnostic LEDs for quick status checks of ECU power, engine run, TPS calibration, cam signal, and more\u003c\/li\u003e\n\u003cli\u003eCompact ECU design (7.45” x 4.1” x 1.66”) for flexible mounting options\u003c\/li\u003e\n\u003cli\u003e3.5” touchscreen handheld controller with calibration wizard, data logging, and customizable gauge displays\u003c\/li\u003e\n\u003cli\u003eFree Holley EFI tuning software for full laptop compatibility and advanced tuning capabilities\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eConstruction \u0026amp; Design:\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eThe Terminator X ECU is engineered with a compact, durable enclosure designed to withstand the rigors of automotive environments. Its robust internal electronics feature high impedance injector drivers and integrated sensors to reduce the need for external components, simplifying installation and improving reliability. The included handheld controller features a bright, responsive 3.5-inch LCD touchscreen that allows intuitive access to tuning parameters and real-time engine data.\u003c\/p\u003e\u003cp\u003eHolley EFI’s design philosophy emphasizes ease of use without sacrificing advanced functionality, making the Terminator X an ideal choice for both novice tuners and experienced professionals.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eInstallation \u0026amp; Fitment:\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eThis EFI kit is designed as a plug-and-play solution for Chrysler Gen III HEMI engines from 2003 to 2013+ (5.7L, 6.1L, and 6.4L non-VVT). Installation requires minimal modifications, as the ECU integrates seamlessly with factory wiring harnesses and sensors. The kit includes all necessary harnesses, vacuum adapters, and sensors to facilitate a straightforward setup.\u003c\/p\u003e\u003cp\u003eFor boosted applications, the internal MAP sensor can be disabled in favor of an external MAP sensor harness, which is included with a terminated connector for easy installation. The compact ECU size allows flexible mounting locations, but it is important to install the unit with diagnostic LEDs facing upward for proper visibility.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat's Included:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eTerminator X ECU with integrated 1 bar MAP sensor\u003c\/li\u003e\n\u003cli\u003e3.5” touchscreen handheld controller with calibration wizard\u003c\/li\u003e\n\u003cli\u003eEV1 or EV6 injector harness (based on injector configuration)\u003c\/li\u003e\n\u003cli\u003eBosch LSU 4.9 wideband O2 sensors\u003c\/li\u003e\n\u003cli\u003eVacuum hose adapters (1\/8”, 1\/4”, and 3\/16” sizes)\u003c\/li\u003e\n\u003cli\u003eExternal MAP sensor harness with terminated connector\u003c\/li\u003e\n\u003cli\u003eComprehensive wiring harness and connectors\u003c\/li\u003e\n\u003cli\u003eFree Holley EFI tuning software for laptop use\u003c\/li\u003e\n\u003cli\u003eDetailed installation and tuning instructions\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eIdeal For:\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eThe Holley EFI Terminator X Gen III HEMI EFI Kit is perfect for enthusiasts and builders seeking a reliable, feature-rich engine management system for Chrysler Gen III HEMI engines without VVT. It suits a wide range of applications, from budget-friendly street builds to high-performance race cars requiring advanced boost and nitrous control. Its plug-and-play design and included base maps enable quick installation and fast tuning, making it an excellent choice for both first-time EFI users and seasoned tuners.\u003c\/p\u003e","brand":"Holley EFI","offers":[{"title":"Default Title","offer_id":47315668402388,"sku":"550-1223","price":1949.95,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0660\/8542\/1268\/files\/3455_8ad960e19b49a7de03edcb417c059d9b39f83fff_eaa76cfc-0ea6-4648-a03f-957087f1303f.webp?v=1766655091"},{"product_id":"holley-efi-terminator-x-2007-2013-hemi-gen-iii-kit-550-1224","title":"Holley EFI Terminator X Gen III HEMI EFI Kit: Chrysler 300 \/ Dodge Ram 1500 (03-14)","description":"\u003ch3\u003eHolley EFI Terminator X Gen III HEMI EFI Kit\u003c\/h3\u003e\u003cp\u003e2003–2013+ Chrysler 5.7L \/ 6.1L \/ 6.4L (Non-VVT) Engines\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003e550-1224\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eOverview:\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eThe Holley EFI Terminator X Gen III HEMI EFI Kit is a comprehensive engine management solution designed specifically for Chrysler Gen III HEMI engines produced from 2003 through 2013 and beyond. Compatible with 5.7L, 6.1L, and 6.4L engines without variable valve timing (Non-VVT), this kit offers a plug-and-play EFI upgrade that transforms your factory fuel injection system into a fully programmable, high-performance setup.\u003c\/p\u003e\u003cp\u003eIdeal for enthusiasts building anything from a budget-friendly street machine to a serious track car, the Terminator X delivers advanced features like real-time fuel learning, high impedance injector drivers, and integrated sensors to ensure precise tuning and reliable engine control. The included 3.5\" LCD touchscreen handheld makes setup and tuning accessible for beginners while offering full laptop compatibility for advanced users.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eKey Features:\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eThe Terminator X EFI Kit combines cutting-edge technology with user-friendly design, providing a powerful and versatile engine control platform. Key features include:\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003ePlug-and-play compatibility with Chrysler Gen III HEMI 5.7L, 6.1L, and 6.4L engines (2003–2013+, Non-VVT only)\u003c\/li\u003e\n\u003cli\u003eHigh impedance injector drivers supporting Holley EFI and most stock injectors (EV1 or EV6 injector harness included)\u003c\/li\u003e\n\u003cli\u003eIntegrated Bosch LSU 4.9 wideband O2 sensors for accurate air\/fuel ratio monitoring and tuning\u003c\/li\u003e\n\u003cli\u003eBuilt-in 1 bar MAP sensor with option to disable for external MAP sensor use, ideal for boosted applications\u003c\/li\u003e\n\u003cli\u003eFour programmable inputs and outputs for electric fans, boost control solenoids, nitrous activation, and more\u003c\/li\u003e\n\u003cli\u003eAdvanced boost control options including boost vs. time, gear, RPM, speed, and safety limits\u003c\/li\u003e\n\u003cli\u003eComprehensive nitrous control with wet\/dry, progressive\/non-progressive channels, and closed-loop AFR targeting\u003c\/li\u003e\n\u003cli\u003eMultiple advanced tables for fuel and spark tuning, including 1D and 2D tables with gear-based configurations\u003c\/li\u003e\n\u003cli\u003eOn-board diagnostic LEDs for quick status checks of ECU power, engine run, TPS calibration, and cam signals\u003c\/li\u003e\n\u003cli\u003eCompact ECU design (7.45\" x 4.1\" x 1.66\") allowing flexible mounting options\u003c\/li\u003e\n\u003cli\u003eFree Holley EFI tuning software with full laptop compatibility for advanced calibration and data logging\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eConstruction \u0026amp; Design:\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eThe Terminator X ECU is engineered with a compact, durable housing designed to withstand the rigors of automotive environments. Its small footprint allows for versatile mounting locations within the engine bay or cabin. The kit includes high-quality wiring harnesses tailored for EV1 or EV6 injectors, ensuring seamless integration with your existing fuel system. The inclusion of Bosch LSU 4.9 wideband sensors guarantees reliable and precise air\/fuel ratio measurements critical for optimal engine performance and safety.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eInstallation \u0026amp; Fitment:\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eThis EFI kit is designed for straightforward installation on Chrysler Gen III HEMI engines from 2003 to 2013 and later, specifically for 5.7L, 6.1L, and 6.4L engines without variable valve timing. The plug-and-play harnesses simplify wiring, minimizing the need for custom modifications. The kit includes vacuum hose adapters in multiple sizes (1\/8”, 1\/4”, and 3\/16”) to facilitate sensor connections. The diagnostic LEDs on the ECU provide immediate feedback during installation and troubleshooting, while the handheld touchscreen guides users through calibration and tuning.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat's Included:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eTerminator X ECU with integrated 1 bar MAP sensor\u003c\/li\u003e\n\u003cli\u003e3.5\" LCD touchscreen handheld controller with calibration wizard\u003c\/li\u003e\n\u003cli\u003eEV1 or EV6 injector harness (based on injector type)\u003c\/li\u003e\n\u003cli\u003eBosch LSU 4.9 wideband O2 sensors\u003c\/li\u003e\n\u003cli\u003eVacuum hose adapters (1\/8”, 1\/4”, and 3\/16” sizes)\u003c\/li\u003e\n\u003cli\u003eTerminated connector for external MAP sensor (for boosted applications)\u003c\/li\u003e\n\u003cli\u003eComprehensive wiring harnesses and connectors\u003c\/li\u003e\n\u003cli\u003eFree Holley EFI tuning software with laptop compatibility\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eIdeal For:\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eThe Holley EFI Terminator X Gen III HEMI EFI Kit is perfect for automotive enthusiasts and professional builders seeking a reliable, feature-rich engine management system for Chrysler Gen III HEMI engines. Whether you are upgrading a factory fuel injection system, building a street performance vehicle, or constructing a dedicated race car, this kit offers the flexibility and control needed to optimize engine performance, fuel efficiency, and drivability.\u003c\/p\u003e","brand":"Holley EFI","offers":[{"title":"Default Title","offer_id":47315668435156,"sku":"550-1224","price":1949.95,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0660\/8542\/1268\/files\/3456_8ad960e19b49a7de03edcb417c059d9b39f83fff_9d5f9d25-4045-4aff-8ab2-d9753a8c295b.webp?v=1766655091"},{"product_id":"holley-efi-terminator-x-2007-2013-hemi-gen-iii-kit-550-1225","title":"Holley EFI Terminator X Gen III HEMI EFI Kit: Chrysler 300 \/ Dodge Ram 1500 (03-15)","description":"\u003ch3\u003eHolley EFI Terminator X Gen III HEMI EFI Kit\u003c\/h3\u003e\u003cp\u003e2003–2013+ Chrysler 5.7L \/ 6.1L \/ 6.4L Non-VVT HEMI Engines\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003e550-1225\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eOverview:\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eThe Holley EFI Terminator X Gen III HEMI EFI Kit is a comprehensive engine management solution designed specifically for Chrysler Gen III HEMI engines produced from 2003 through 2013 and beyond. Compatible with 5.7L, 6.1L, and 6.4L non-VVT engines, this kit delivers precise fuel and ignition control to optimize performance, drivability, and tuning flexibility. Whether you're upgrading a street machine, building a weekend racer, or assembling a budget-friendly project, the Terminator X offers advanced features and user-friendly operation to get you on the road or track quickly.\u003c\/p\u003e\u003cp\u003eEquipped with real-time fuel learning and high impedance injector drivers, this EFI kit simplifies tuning and ensures smooth engine operation. The included 3.5\" LCD touchscreen handheld controller provides an intuitive calibration wizard, gauge displays, and data logging, making it accessible for both novice and experienced tuners. Holley EFI’s industry-leading software and support further enhance the tuning experience, allowing full laptop connectivity for advanced adjustments.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eKey Features:\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eThe Terminator X Gen III HEMI EFI Kit combines cutting-edge technology with practical features tailored for Chrysler HEMI engines:\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003ePlug-and-play engine control for 2003–2013+ Chrysler Gen III HEMI 5.7L, 6.1L, and 6.4L non-VVT engines\u003c\/li\u003e\n\u003cli\u003eCompatible with Holley EFI accessories including gauges, shift lights, and digital\/pro dashes (Holley P\/N 553-106, 553-111, 553-112)\u003c\/li\u003e\n\u003cli\u003eIncludes EV1 or EV6 injector harness based on injector configuration\u003c\/li\u003e\n\u003cli\u003eHigh impedance injector drivers support Holley EFI and most stock injectors (does not support low impedance injectors)\u003c\/li\u003e\n\u003cli\u003eIntegrated Bosch LSU 4.9 wideband O2 sensors for accurate air\/fuel ratio monitoring and tuning\u003c\/li\u003e\n\u003cli\u003eBuilt-in 1 bar MAP sensor with external MAP sensor option for boosted applications\u003c\/li\u003e\n\u003cli\u003eFour programmable inputs and outputs for electric fans, boost control solenoids, nitrous activation, and more\u003c\/li\u003e\n\u003cli\u003eAdvanced boost control features including boost vs. time, gear, RPM, speed, and safety limits\u003c\/li\u003e\n\u003cli\u003eComprehensive nitrous control with wet\/dry, progressive\/non-progressive modes, and closed-loop AFR targeting\u003c\/li\u003e\n\u003cli\u003eMultiple advanced tables for flexible tuning configurations, including 1D and 2D maps\u003c\/li\u003e\n\u003cli\u003eOn-board diagnostic LEDs for quick status checks of ECU power, engine run, TPS calibration, and cam signals\u003c\/li\u003e\n\u003cli\u003eCompact ECU design measuring 7.45” x 4.1” x 1.66” for versatile mounting options\u003c\/li\u003e\n\u003cli\u003eFree Holley EFI tuning software with full laptop compatibility for detailed tuning and data logging\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eConstruction \u0026amp; Design:\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eThe Terminator X ECU is engineered with a compact, rugged enclosure designed to withstand the demanding automotive environment. Its small footprint allows for flexible installation locations within the engine bay or interior compartments. The kit includes high-quality wiring harnesses and vacuum adapters (1\/8”, 1\/4”, and 3\/16”) to ensure seamless integration with your engine’s existing components. Holley’s precision manufacturing and robust electronics deliver reliable performance and long-term durability, making it a trusted choice for enthusiasts and professional builders alike.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eInstallation \u0026amp; Fitment:\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eThis EFI kit is designed for straightforward installation on Chrysler Gen III HEMI engines without variable valve timing (VVT) from 2003 to 2013 and later. The plug-and-play harnesses and included injector connectors simplify wiring, reducing installation time and complexity. The ECU’s compact size allows for mounting in tight spaces, but it is important to orient the diagnostic LEDs facing upward for proper operation. The included handheld touchscreen controller and calibration wizard guide users through initial setup and tuning, minimizing the need for specialized tools or external support.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat's Included:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eTerminator X ECU for Gen III HEMI engines\u003c\/li\u003e\n\u003cli\u003e3.5” LCD touchscreen handheld controller with calibration wizard\u003c\/li\u003e\n\u003cli\u003eEV1 or EV6 injector harness (based on injector type)\u003c\/li\u003e\n\u003cli\u003eBosch LSU 4.9 wideband O2 sensors\u003c\/li\u003e\n\u003cli\u003eBuilt-in 1 bar MAP sensor and terminated connector for external MAP sensor\u003c\/li\u003e\n\u003cli\u003eVacuum hose adapters (1\/8”, 1\/4”, 3\/16”)\u003c\/li\u003e\n\u003cli\u003eWiring harnesses and connectors for sensors and inputs\/outputs\u003c\/li\u003e\n\u003cli\u003eFree Holley EFI tuning software with laptop compatibility\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eIdeal For:\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eThe Holley EFI Terminator X Gen III HEMI EFI Kit is ideal for enthusiasts and builders seeking a reliable, feature-rich engine management system for Chrysler 5.7L, 6.1L, and 6.4L non-VVT HEMI engines. It suits a wide range of applications including street performance vehicles, track cars, muscle cars, and budget builds. Its advanced tuning capabilities and accessory compatibility also make it a solid choice for those planning to add boost, nitrous, or other performance enhancements.\u003c\/p\u003e","brand":"Holley EFI","offers":[{"title":"Default Title","offer_id":47315668467924,"sku":"550-1225","price":1949.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0660\/8542\/1268\/files\/3457_8ad960e19b49a7de03edcb417c059d9b39f83fff_f15c210a-5caa-4961-9387-fda8d981991f.webp?v=1766655090"},{"product_id":"holley-efi-terminator-x-max-2003-2006-gen-iii-hemi-550-1420","title":"Holley EFI Terminator X Max EFI System: Fits Chrysler \/ Dodge (03-06)","description":"\u003ch3\u003eHolley EFI Terminator X Max EFI System\u003c\/h3\u003e\u003cp\u003e2003–2006 Chrysler Gen III HEMI 5.7L \/ 6.1L \/ 6.4L (Non-VVT)\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003e550-1420\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eOverview:\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eThe Holley EFI Terminator X Max EFI System is a comprehensive engine management solution designed specifically for Chrysler Gen III HEMI engines from 2003 to 2006, including the 5.7L, 6.1L, and 6.4L variants equipped with the factory Drive-by-Wire (DBW) throttle body. Tailored for non-VVT applications, this system delivers precise fuel and ignition control, enabling enthusiasts and professional tuners to optimize engine performance with ease.\u003c\/p\u003e\u003cp\u003eWhether you're upgrading a street-driven muscle car or building a high-performance track machine, the Terminator X Max offers a plug-and-play installation with advanced features such as real-time fuel learning, integrated sensors, and multiple programmable inputs and outputs. Its intuitive 3.5\" touchscreen handheld controller and free Holley EFI software make tuning accessible for both beginners and experienced users.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eKey Features:\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eThe Terminator X Max EFI System combines cutting-edge technology with user-friendly design to provide a versatile and powerful tuning platform. Key features include:\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003ePlug-and-play compatibility with 2003–2006 Chrysler Gen III HEMI 5.7L, 6.1L, and 6.4L engines using factory Drive-by-Wire throttle bodies (non-VVT only)\u003c\/li\u003e\n\u003cli\u003eHigh impedance injector drivers supporting Holley EFI and most stock injectors (EV1 injector harness included)\u003c\/li\u003e\n\u003cli\u003eIntegrated Bosch LSU 4.9 wideband O2 sensors for accurate air\/fuel ratio monitoring and precise tuning\u003c\/li\u003e\n\u003cli\u003eBuilt-in 1 bar MAP sensor with the option to disable for external MAP sensor use in boosted applications\u003c\/li\u003e\n\u003cli\u003eFour programmable inputs and outputs for electric fans, boost control solenoids, nitrous activation, and more\u003c\/li\u003e\n\u003cli\u003eAdvanced boost control options including boost vs. time, gear, RPM, speed, and built-in safeties\u003c\/li\u003e\n\u003cli\u003eComprehensive nitrous control with support for wet\/dry, progressive\/non-progressive setups, and closed-loop AFR targeting\u003c\/li\u003e\n\u003cli\u003eMultiple advanced tuning tables (1D and 2D) for flexible fuel and ignition mapping\u003c\/li\u003e\n\u003cli\u003eOn-board diagnostic LEDs for quick status checks of ECU power, engine run, TPS calibration, cam signal, and other critical parameters\u003c\/li\u003e\n\u003cli\u003eCompact ECU design (7.45” x 4.1” x 1.66”) for versatile mounting options\u003c\/li\u003e\n\u003cli\u003e3.5” touchscreen handheld controller with calibration wizard, data logging, and customizable gauge displays\u003c\/li\u003e\n\u003cli\u003eFree Holley EFI software suite for full laptop tuning access and advanced calibration\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eConstruction \u0026amp; Design:\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eThe Terminator X Max EFI system is engineered with durability and precision in mind. The compact ECU housing is designed to withstand the harsh automotive environment while providing ample connectivity for sensors and accessories. The included Bosch LSU 4.9 wideband O2 sensors are industry-standard components known for their reliability and accuracy, ensuring consistent air\/fuel ratio readings under all operating conditions.\u003c\/p\u003e\u003cp\u003eHolley’s attention to detail extends to the wiring harnesses and connectors, which are designed for straightforward installation and long-term durability. The system’s software and handheld interface are developed to simplify the tuning process without sacrificing advanced functionality, making it suitable for a wide range of performance applications.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eInstallation \u0026amp; Fitment:\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eThe Terminator X Max EFI System is a direct-fit solution for 2003–2006 Chrysler Gen III HEMI engines equipped with factory Drive-by-Wire throttle bodies, excluding VVT models. Installation is straightforward with included EV1 injector harnesses and vacuum hose adapters in multiple sizes (1\/8”, 1\/4”, and 3\/16”). The plug-and-play design minimizes the need for custom wiring or modifications, allowing for a clean and professional setup.\u003c\/p\u003e\u003cp\u003eFor boosted applications, the internal MAP sensor can be disabled to accommodate an external MAP sensor, with a terminated connector provided for seamless integration. The compact ECU can be mounted in virtually any location, but it is important to orient the diagnostic LEDs facing upward for proper visibility.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat's Included:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eTerminator X Max ECU (Engine Control Unit)\u003c\/li\u003e\n\u003cli\u003e3.5” touchscreen handheld controller with calibration wizard\u003c\/li\u003e\n\u003cli\u003eEV1 injector harness\u003c\/li\u003e\n\u003cli\u003eBosch LSU 4.9 wideband O2 sensors\u003c\/li\u003e\n\u003cli\u003eBuilt-in 1 bar MAP sensor with external MAP sensor connector\u003c\/li\u003e\n\u003cli\u003eVacuum hose adapters (1\/8”, 1\/4”, 3\/16”)\u003c\/li\u003e\n\u003cli\u003eWiring harnesses and connectors for sensors and inputs\/outputs\u003c\/li\u003e\n\u003cli\u003eFree Holley EFI tuning software for laptop\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eIdeal For:\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eThe Holley EFI Terminator X Max is ideal for enthusiasts and builders seeking a reliable, feature-rich EFI system for their 2003–2006 Chrysler Gen III HEMI engines without variable valve timing. It suits a wide range of builds from budget-friendly street cars to boosted race vehicles, offering advanced tuning capabilities and expandability at an accessible price point. Whether upgrading from a carburetor or replacing a factory ECU, this system provides the control and flexibility needed to maximize engine performance and drivability.\u003c\/p\u003e","brand":"Holley EFI","offers":[{"title":"Default Title","offer_id":47315668500692,"sku":"550-1420","price":2299.95,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0660\/8542\/1268\/files\/3458_37e49631192019cdcdfda3ff8addad605dc3e06c_a9511658-7eea-44f0-8c2d-26ed881672e2.webp?v=1766655089"},{"product_id":"holley-efi-terminator-x-max-2003-2006-gen-iii-hemi-550-1421","title":"Holley EFI Terminator X Max Gen III HEMI EFI System: Fits Most Chrysler \/ Dodge Models (2003-2015)","description":"\u003ch3\u003eHolley EFI Terminator X Max Gen III HEMI EFI System\u003c\/h3\u003e\u003cp\u003e2003–2006 Chrysler 5.7L \/ 6.1L \/ 6.4L GEN III HEMI Engines\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003e550-1421\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eOverview:\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eThe Holley EFI Terminator X Max Gen III HEMI EFI System is a comprehensive engine management solution designed specifically for Chrysler GEN III HEMI engines from 2003 to 2006, including the 5.7L, 6.1L, and 6.4L variants equipped with the factory Drive-by-Wire throttle body (non-VVT). This advanced EFI system delivers precise fuel and ignition control, real-time fuel learning, and extensive tuning capabilities, making it ideal for enthusiasts seeking reliable, high-performance engine management without the complexity of traditional carburetion.\u003c\/p\u003e\u003cp\u003eWhether you are upgrading a street-driven muscle car or building a track-ready race machine, the Terminator X Max offers a plug-and-play solution that simplifies installation and accelerates your tuning process. Its intuitive 3.5\" touchscreen handheld and included Holley EFI software provide both beginner-friendly calibration wizards and advanced laptop tuning options, ensuring you have full control over your engine’s performance.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eKey Features:\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eDesigned to maximize the potential of your GEN III HEMI, the Terminator X Max includes a host of features engineered for flexibility, precision, and ease of use:\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003ePlug-and-play compatibility with 2003–2006 Chrysler 5.7L, 6.1L, and 6.4L GEN III HEMI engines using factory Drive-by-Wire throttle bodies (non-VVT only)\u003c\/li\u003e\n\u003cli\u003eHigh impedance injector drivers supporting Holley EFI and most stock injectors (does not support low impedance injectors)\u003c\/li\u003e\n\u003cli\u003eIntegrated Bosch LSU 4.9 wideband O2 sensors for accurate air\/fuel ratio monitoring and closed-loop tuning\u003c\/li\u003e\n\u003cli\u003eBuilt-in 1 bar MAP sensor with option to disable for external MAP sensor use on boosted applications\u003c\/li\u003e\n\u003cli\u003eFour programmable inputs and outputs for electric fans, boost control solenoids, nitrous activation, and more\u003c\/li\u003e\n\u003cli\u003eAdvanced boost control options including boost vs. time, gear, RPM, and speed with built-in safeties\u003c\/li\u003e\n\u003cli\u003eComprehensive nitrous control channels supporting wet\/dry, progressive\/non-progressive setups with rich\/lean safeties\u003c\/li\u003e\n\u003cli\u003eMultiple advanced tuning tables including 1D and 2D maps for fuel, spark, and boost management\u003c\/li\u003e\n\u003cli\u003eCompact ECU design (7.45” x 4.1” x 1.66”) for versatile mounting locations\u003c\/li\u003e\n\u003cli\u003e3.5” touchscreen handheld with calibration wizard, data logging, and customizable gauge displays\u003c\/li\u003e\n\u003cli\u003eFree Holley EFI tuning software for full laptop control and advanced tuning capabilities\u003c\/li\u003e\n\u003cli\u003ePlug-and-play compatibility with Holley EFI accessories such as gauges, shift lights, and digital\/pro dashes (P\/N 553-106, 553-111, 553-112)\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eConstruction \u0026amp; Design:\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eThe Terminator X Max ECU is engineered with a compact, rugged enclosure designed to withstand the harsh automotive environment while providing flexible mounting options. The system integrates high-quality Bosch wideband O2 sensors and a reliable 1 bar MAP sensor to ensure precise engine monitoring. The included EV6 injector harness and vacuum hose adapters (1\/8”, 1\/4”, and 3\/16”) facilitate seamless integration with factory components, minimizing installation complexity.\u003c\/p\u003e\u003cp\u003eHolley’s focus on user-friendly design is evident in the intuitive touchscreen handheld controller, which offers quick access to tuning parameters, real-time data, and diagnostic LEDs that provide instant feedback on critical engine functions such as ECU power, engine run status, TPS calibration, and cam signal detection.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eInstallation \u0026amp; Fitment:\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eThe Terminator X Max EFI system is a direct plug-and-play solution for 2003–2006 Chrysler GEN III HEMI engines equipped with factory Drive-by-Wire throttle bodies (non-VVT). Installation requires no major modifications, as the system includes all necessary wiring harnesses and adapters to connect with stock injectors and sensors. The compact ECU can be mounted in a variety of locations, but it is important to orient the diagnostic LEDs facing upward for proper visibility.\u003c\/p\u003e\u003cp\u003eFor boosted applications, the internal MAP sensor can be disabled to accommodate an external MAP sensor, with a terminated connector included for easy installation. The system’s compatibility with Holley EFI accessories further simplifies integration with existing gauges and control modules.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat's Included:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eTerminator X Max ECU unit\u003c\/li\u003e\n\u003cli\u003e3.5” touchscreen handheld controller\u003c\/li\u003e\n\u003cli\u003eEV6 injector harness\u003c\/li\u003e\n\u003cli\u003eBosch LSU 4.9 wideband O2 sensors\u003c\/li\u003e\n\u003cli\u003eBuilt-in 1 bar MAP sensor\u003c\/li\u003e\n\u003cli\u003eVacuum hose adapters (1\/8”, 1\/4”, 3\/16” sizes)\u003c\/li\u003e\n\u003cli\u003eTerminated connector for external MAP sensor\u003c\/li\u003e\n\u003cli\u003eFree Holley EFI tuning software\u003c\/li\u003e\n\u003cli\u003eBase calibration maps for common GEN III HEMI engine combinations\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eIdeal For:\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eThe Holley EFI Terminator X Max Gen III HEMI EFI System is perfect for enthusiasts and builders who want a reliable, easy-to-install engine management solution for their 2003–2006 Chrysler 5.7L, 6.1L, or 6.4L HEMI engines. It suits a wide range of applications from budget street builds to boosted race cars, offering advanced tuning features without the complexity or cost of standalone systems. Whether upgrading a classic muscle car or building a modern performance machine, this EFI system delivers precise control and adaptability to meet your needs.\u003c\/p\u003e","brand":"Holley EFI","offers":[{"title":"Default Title","offer_id":47315668598996,"sku":"550-1421","price":2299.95,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0660\/8542\/1268\/files\/3459_c0231dbb33572d7c0371c9d918b341a679e08ee2_80f3bc3c-2cbe-49e0-a311-d8d9bf7091b5.webp?v=1766655089"},{"product_id":"holley-efi-terminator-x-max-2007-2012-gen-iii-hemi-550-1422","title":"Holley EFI Terminator X Max Gen III HEMI EFI Controller: 5.7L \/ 6.1L \/ 6.4L Engines (2003-2015)","description":"\u003ch3\u003eHolley EFI Terminator X Max Gen III HEMI EFI Controller\u003c\/h3\u003e\u003cp\u003e2003–2013+ Chrysler 5.7L \/ 6.1L \/ 6.4L GEN III HEMI Engines\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003e550-1422\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eOverview:\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eThe Holley EFI Terminator X Max Gen III HEMI EFI Controller is a comprehensive engine management solution designed specifically for Chrysler GEN III HEMI engines produced from 2003 through 2013 and beyond. Compatible with 5.7L, 6.1L, and 6.4L engines equipped with the factory Drive-by-Wire (DBW) throttle body, this controller is tailored for non-VVT applications. Whether you’re building a street-driven muscle car, a track-ready race machine, or a boosted setup, the Terminator X Max delivers precise fuel and ignition control with advanced features that simplify tuning and maximize engine performance.\u003c\/p\u003e\u003cp\u003eEquipped with a user-friendly 3.5-inch touchscreen handheld and backed by Holley EFI’s industry-leading software suite, this system offers both plug-and-play convenience and deep customization options. It comes preloaded with base maps for common HEMI engine configurations, enabling quick startup and fast tuning to get you on the road or track without delay.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eKey Features:\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eThe Terminator X Max EFI Controller integrates advanced technology and versatile inputs\/outputs to meet the demands of modern performance builds. Key features include:\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003ePlug-and-play compatibility with Chrysler GEN III HEMI 5.7L, 6.1L, and 6.4L engines (2003–2013+) using factory DBW throttle bodies (non-VVT only)\u003c\/li\u003e\n\u003cli\u003eHigh impedance injector drivers supporting Holley EFI and most stock injectors (EV1 injector harness included)\u003c\/li\u003e\n\u003cli\u003eIntegrated Bosch LSU 4.9 wideband O2 sensors for accurate air\/fuel ratio monitoring and precise tuning\u003c\/li\u003e\n\u003cli\u003eBuilt-in 1 bar MAP sensor with option to disable for external MAP sensor use, ideal for boosted applications\u003c\/li\u003e\n\u003cli\u003eFour programmable inputs and outputs supporting electric fans, boost control solenoids, nitrous activation, and more\u003c\/li\u003e\n\u003cli\u003eAdvanced boost control strategies including boost vs. time, gear, RPM, and speed, plus boost safeties\u003c\/li\u003e\n\u003cli\u003eComprehensive nitrous control with channels for wet\/dry, progressive or non-progressive operation, and closed-loop AFR targeting\u003c\/li\u003e\n\u003cli\u003eMultiple advanced fuel and ignition tables (1D and 2D) for flexible tuning configurations\u003c\/li\u003e\n\u003cli\u003eOn-board diagnostic LEDs for quick status checks of ECU power, engine run, TPS calibration, cam signal, and other critical parameters\u003c\/li\u003e\n\u003cli\u003eCompact ECU design (7.45” x 4.1” x 1.66”) allowing versatile mounting options\u003c\/li\u003e\n\u003cli\u003eIncludes free Holley EFI tuning software for laptop-based advanced calibration and data logging\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eConstruction \u0026amp; Design:\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eThe Terminator X Max EFI Controller features a rugged, compact ECU engineered for durability and ease of installation in a variety of engine bays. Its solid-state electronics are housed in a corrosion-resistant enclosure designed to withstand the harsh automotive environment. The included handheld touchscreen is ergonomically designed for intuitive navigation, featuring a bright 3.5-inch LCD that simplifies calibration and real-time monitoring. Holley’s engineering ensures seamless integration with factory sensors and actuators, minimizing wiring complexity and installation time.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eInstallation \u0026amp; Fitment:\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eThis EFI controller is designed for straightforward plug-and-play installation on Chrysler GEN III HEMI engines from 2003 to 2013+ with factory Drive-by-Wire throttle bodies, excluding VVT models. The kit includes an EV1 injector harness and vacuum hose adapters in multiple sizes (1\/8”, 1\/4”, and 3\/16”) to facilitate sensor connections. The internal MAP sensor can be disabled to accommodate external MAP sensors for boosted setups, with a terminated connector included for easy integration. The compact ECU can be mounted in virtually any convenient location, but diagnostic LEDs should face upward for proper visibility.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat's Included:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eTerminator X Max Gen III HEMI EFI Controller ECU\u003c\/li\u003e\n\u003cli\u003e3.5” touchscreen handheld controller with calibration wizard\u003c\/li\u003e\n\u003cli\u003eEV1 injector harness\u003c\/li\u003e\n\u003cli\u003eBosch LSU 4.9 wideband O2 sensors\u003c\/li\u003e\n\u003cli\u003eVacuum hose adapters (1\/8”, 1\/4”, 3\/16”)\u003c\/li\u003e\n\u003cli\u003eTerminated connector for external MAP sensor\u003c\/li\u003e\n\u003cli\u003eFree Holley EFI tuning software for laptop\u003c\/li\u003e\n\u003cli\u003eComprehensive base maps for common HEMI engine combinations\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eIdeal For:\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eThe Holley EFI Terminator X Max is ideal for enthusiasts and professional builders seeking a reliable, feature-rich EFI solution for Chrysler GEN III HEMI engines without variable valve timing. It suits a wide range of applications from naturally aspirated street cars to boosted race vehicles and nitrous-equipped setups. Its combination of plug-and-play ease and advanced tuning capabilities makes it perfect for both first-time EFI users and experienced tuners looking for precise control and expandability at a competitive price point.\u003c\/p\u003e","brand":"Holley EFI","offers":[{"title":"Default Title","offer_id":47315668631764,"sku":"550-1422","price":2299.95,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0660\/8542\/1268\/files\/3460_5a3b09030b7bc46d7dfd88edbd6b820f809db803_405b2a70-f81c-4456-a76f-fb68d1c21a2a.webp?v=1766655088"},{"product_id":"holley-efi-terminator-x-max-2007-2012-gen-iii-hemi-550-1423","title":"Holley EFI Terminator X Max Gen III HEMI EFI Controller: Chrysler GEN III HEMI (06-12)","description":"\u003ch3\u003eHolley EFI Terminator X Max Gen III HEMI EFI Controller\u003c\/h3\u003e\u003cp\u003e2006–2012 Chrysler 5.7L \/ 6.1L \/ 6.4L GEN III HEMI Engines\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003e550-1423\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eOverview:\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eThe Holley EFI Terminator X Max Gen III HEMI EFI Controller is a cutting-edge engine management system designed specifically for Chrysler GEN III HEMI engines produced between 2006 and 2012. Compatible with the 5.7L, 6.1L, and 6.4L engines equipped with the factory Drive-by-Wire (DBW) throttle body, this controller delivers precise fuel and ignition control for non-VVT applications. Whether you're upgrading a street machine, building a track-ready race car, or tuning a boosted setup, the Terminator X Max offers a comprehensive, plug-and-play solution that combines advanced features with user-friendly operation.\u003c\/p\u003e\u003cp\u003eEquipped with real-time fuel learning and high impedance injector drivers, this EFI controller simplifies tuning and ensures optimal engine performance. The included 3.5-inch touchscreen handheld and Holley’s industry-leading software suite provide both novice and advanced tuners with intuitive tools to quickly dial in their setups and monitor critical engine parameters.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eKey Features:\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eThe Terminator X Max EFI Controller is packed with versatile features designed to maximize control and customization for your GEN III HEMI engine:\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003ePlug-and-play compatibility with 2006–2012 Chrysler 5.7L, 6.1L, and 6.4L GEN III HEMI engines using factory DBW throttle bodies (non-VVT only)\u003c\/li\u003e\n\u003cli\u003eHigh impedance injector drivers compatible with Holley EFI and most stock injectors (does not support low impedance injectors)\u003c\/li\u003e\n\u003cli\u003eIntegrated Bosch LSU 4.9 wideband O2 sensors for precise air\/fuel ratio monitoring and tuning accuracy\u003c\/li\u003e\n\u003cli\u003eBuilt-in 1 bar MAP sensor with the option to disable for external MAP sensor use, ideal for boosted applications\u003c\/li\u003e\n\u003cli\u003eFour programmable inputs and outputs supporting electric fans, boost control solenoids, nitrous activation, and more\u003c\/li\u003e\n\u003cli\u003eAdvanced boost control options including boost vs. time, gear, RPM, speed, and built-in boost safeties\u003c\/li\u003e\n\u003cli\u003eComprehensive nitrous control with channels for wet\/dry, progressive or non-progressive operation, and closed-loop AFR targeting\u003c\/li\u003e\n\u003cli\u003eMultiple advanced tuning tables (1D and 2D) for fuel, spark, and other engine parameters, allowing nearly unlimited configuration\u003c\/li\u003e\n\u003cli\u003eOnboard diagnostic LEDs for quick status checks including ECU power, engine run, TPS calibration, and cam signal\u003c\/li\u003e\n\u003cli\u003eCompact ECU design measuring 7.45” x 4.1” x 1.66” for flexible mounting options\u003c\/li\u003e\n\u003cli\u003eIncluded EV6 injector harness and vacuum hose adapters (1\/8”, 1\/4”, and 3\/16” sizes) for seamless installation\u003c\/li\u003e\n\u003cli\u003eCompatible with Holley EFI accessories such as gauges, shift lights, modules, and digital\/pro dashes (Holley P\/N 553-106, 553-111, 553-112)\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eConstruction \u0026amp; Design:\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eThe Terminator X Max EFI Controller is engineered with durability and compactness in mind. Its rugged enclosure protects sensitive electronics from harsh automotive environments while maintaining a small footprint for versatile mounting locations. The integrated sensors and high-quality Bosch wideband O2 sensors ensure reliable, accurate data acquisition critical for precise engine management. The handheld touchscreen interface is designed for ease of use, featuring a responsive LCD that simplifies calibration and real-time monitoring.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eInstallation \u0026amp; Fitment:\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eThis EFI controller is designed for straightforward, plug-and-play installation on Chrysler GEN III HEMI engines from 2006 to 2012 equipped with factory Drive-by-Wire throttle bodies (non-VVT). The included EV6 injector harness and vacuum hose adapters facilitate a clean and efficient setup without the need for extensive modifications. The compact ECU size allows for flexible mounting options, but it is important to install the unit with the diagnostic LEDs facing upward for proper operation. The system also supports a wide range of Holley EFI accessories to expand functionality as needed.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat's Included:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eHolley EFI Terminator X Max Gen III HEMI EFI Controller ECU\u003c\/li\u003e\n\u003cli\u003e3.5-inch touchscreen handheld controller with calibration wizard and gauge display\u003c\/li\u003e\n\u003cli\u003eEV6 injector harness compatible with high impedance injectors\u003c\/li\u003e\n\u003cli\u003eBosch LSU 4.9 wideband O2 sensors for accurate air\/fuel ratio measurement\u003c\/li\u003e\n\u003cli\u003eBuilt-in 1 bar MAP sensor with external MAP sensor harness connector\u003c\/li\u003e\n\u003cli\u003eVacuum hose adapters in 1\/8”, 1\/4”, and 3\/16” sizes\u003c\/li\u003e\n\u003cli\u003eComprehensive wiring and installation instructions\u003c\/li\u003e\n\u003cli\u003eFree Holley EFI tuning software for laptop-based advanced tuning\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eIdeal For:\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eThe Holley EFI Terminator X Max is ideal for enthusiasts and professional tuners who demand precise engine management for Chrysler GEN III HEMI engines without variable valve timing. It suits a wide range of applications including naturally aspirated street cars, mild to heavily boosted builds, and nitrous-equipped race vehicles. Whether you are building a budget-friendly daily driver or a high-performance race car, this EFI controller offers the flexibility, reliability, and advanced features needed to optimize power and drivability.\u003c\/p\u003e","brand":"Holley EFI","offers":[{"title":"Default Title","offer_id":47315668664532,"sku":"550-1423","price":2299.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0660\/8542\/1268\/files\/3461_ed176e7da005affdb1b64d6ef902c8e2b2819fc5_fe5e0ab3-bf14-4685-a4af-8921e90fd7ea.webp?v=1766655088"},{"product_id":"holley-efi-terminator-x-max-2013-gen-iii-hemi-550-1424","title":"Holley EFI Terminator X Max Gen III HEMI EFI Controller: Fits Chrysler GEN III HEMI (03-13+)","description":"\u003ch3\u003eHolley EFI Terminator X Max Gen III HEMI EFI Controller\u003c\/h3\u003e\u003cp\u003e2003–2013+ Chrysler GEN III HEMI 5.7L \/ 6.1L \/ 6.4L Engines\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003e550-1424\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eOverview:\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eThe Holley EFI Terminator X Max Gen III HEMI EFI Controller is a high-performance engine management system designed specifically for Chrysler GEN III HEMI engines produced from 2003 through 2013 and beyond. Compatible with 5.7L, 6.1L, and 6.4L engines equipped with the factory Drive-by-Wire (DBW) throttle body, this controller is tailored for non-VVT applications. It offers a comprehensive plug-and-play solution that simplifies tuning and enhances engine performance for street, track, or race use.\u003c\/p\u003e\u003cp\u003eIdeal for enthusiasts looking to upgrade their factory engine management without breaking the bank, the Terminator X Max delivers advanced features such as real-time fuel learning, integrated sensors, and multiple programmable inputs and outputs. Whether building a naturally aspirated street machine or a boosted race car, this EFI controller provides the technology and flexibility needed to optimize power and drivability.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eKey Features:\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eThe Terminator X Max EFI Controller comes loaded with features that make it a versatile and powerful choice for GEN III HEMI owners:\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003ePlug-and-play compatibility with Chrysler GEN III HEMI 5.7L, 6.1L, and 6.4L engines (2003–2013+) using factory DBW throttle bodies (non-VVT only)\u003c\/li\u003e\n\u003cli\u003eHigh impedance injector drivers supporting Holley EFI and most stock injectors (EV1 injector harness included)\u003c\/li\u003e\n\u003cli\u003eIntegrated Bosch LSU 4.9 wideband O2 sensors for precise air\/fuel ratio monitoring and tuning\u003c\/li\u003e\n\u003cli\u003eBuilt-in 1 bar MAP sensor with the option to disable for external MAP sensor use, ideal for boosted applications\u003c\/li\u003e\n\u003cli\u003eFour programmable inputs and outputs for electric fans, boost control solenoids, nitrous activation, and more\u003c\/li\u003e\n\u003cli\u003eAdvanced boost control options including boost vs. time, gear, RPM, speed, and built-in safeties\u003c\/li\u003e\n\u003cli\u003eComprehensive nitrous control with support for wet\/dry, progressive\/non-progressive systems, and closed-loop AFR targets\u003c\/li\u003e\n\u003cli\u003eMultiple advanced tuning tables (1D and 2D) for flexible calibration and engine management\u003c\/li\u003e\n\u003cli\u003e3.5” touchscreen handheld with an intuitive calibration wizard, data logging, and custom gauge display\u003c\/li\u003e\n\u003cli\u003eCompact ECU design (7.45” x 4.1” x 1.66”) for versatile mounting options\u003c\/li\u003e\n\u003cli\u003eFree Holley EFI tuning software for full laptop access and advanced tuning capabilities\u003c\/li\u003e\n\u003cli\u003eOn-board diagnostic LEDs for quick status checks of ECU power, engine run, TPS calibration, cam signal, and more\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eConstruction \u0026amp; Design:\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eThe Terminator X Max EFI Controller is engineered with durability and compactness in mind. Its robust enclosure protects sensitive electronics while allowing for flexible mounting in tight engine bays. The included EV1 injector harness and vacuum hose adapters (1\/8”, 1\/4”, and 3\/16”) ensure seamless integration with factory components. Holley’s attention to detail in design guarantees reliable operation under demanding conditions, making it suitable for both street and track environments.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eInstallation \u0026amp; Fitment:\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eThis EFI controller is designed for straightforward installation on 2003 to 2013+ Chrysler GEN III HEMI engines with factory Drive-by-Wire throttle bodies (non-VVT). The plug-and-play nature minimizes wiring complexity, and the included harnesses and adapters simplify connections. The compact ECU can be mounted in various locations, but it is important to orient the diagnostic LEDs facing upward for proper visibility. The system supports multiple Holley EFI accessories, allowing for expanded functionality as needed.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat's Included:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eHolley EFI Terminator X Max Gen III HEMI ECU\u003c\/li\u003e\n\u003cli\u003e3.5” touchscreen handheld controller with calibration wizard\u003c\/li\u003e\n\u003cli\u003eEV1 injector harness\u003c\/li\u003e\n\u003cli\u003eBosch LSU 4.9 wideband O2 sensors\u003c\/li\u003e\n\u003cli\u003eVacuum hose adapters (1\/8”, 1\/4”, and 3\/16” sizes)\u003c\/li\u003e\n\u003cli\u003eTerminated connector for external MAP sensor harness (for boosted setups)\u003c\/li\u003e\n\u003cli\u003eFree Holley EFI tuning software download\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eIdeal For:\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eThe Holley EFI Terminator X Max is perfect for enthusiasts and builders who want a reliable, feature-rich EFI controller for their GEN III HEMI engines. Whether you are upgrading a factory setup, building a street performance vehicle, or constructing a boosted race car, this system offers the tuning flexibility and control necessary to maximize engine potential. Its ease of use and comprehensive feature set make it suitable for both first-time EFI users and experienced tuners alike.\u003c\/p\u003e","brand":"Holley EFI","offers":[{"title":"Default Title","offer_id":47315668697300,"sku":"550-1424","price":2299.95,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0660\/8542\/1268\/files\/3462_d15ad3f131fce02ae415350a9511b38747fdee2a_68341166-ee8e-4af6-8437-73c80d061d1d.webp?v=1766655087"},{"product_id":"holley-efi-terminator-x-max-2013-gen-iii-hemi-550-1425","title":"Holley EFI Terminator X Max Gen III HEMI EFI Controller: Chrysler \/ Dodge Ram GEN III HEMI (03-13+)","description":"\u003ch3\u003eHolley EFI Terminator X Max Gen III HEMI EFI Controller\u003c\/h3\u003e\u003cp\u003e2003–2013+ Chrysler GEN III HEMI 5.7L \/ 6.1L \/ 6.4L Engines (Non-VVT, Drive-by-Wire)\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003e550-1425\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eOverview:\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eThe Holley EFI Terminator X Max Gen III HEMI EFI Controller is a cutting-edge engine management system designed specifically for Chrysler GEN III HEMI engines produced from 2003 through 2013 and beyond. Compatible with 5.7L, 6.1L, and 6.4L engines equipped with the factory Drive-by-Wire throttle body (non-VVT only), this controller offers a plug-and-play solution that simplifies tuning and maximizes engine performance.\u003c\/p\u003e\u003cp\u003eWhether you are building a street-driven muscle car, a weekend track warrior, or a boosted race vehicle, the Terminator X Max provides advanced features such as real-time fuel learning, multiple programmable inputs and outputs, and comprehensive boost and nitrous control. Its intuitive 3.5” touchscreen handheld and included Holley EFI software make setup and tuning accessible for both beginners and experienced tuners alike.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eKey Features:\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eThe Terminator X Max EFI Controller is packed with versatile features engineered to enhance control and customization for your GEN III HEMI engine:\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003ePlug-and-play compatibility with 2003–2013+ Chrysler GEN III HEMI 5.7L, 6.1L, and 6.4L engines using factory Drive-by-Wire throttle bodies (non-VVT only)\u003c\/li\u003e\n\u003cli\u003eHigh impedance injector drivers supporting Holley EFI and most stock injectors (does not support low impedance injectors)\u003c\/li\u003e\n\u003cli\u003eIntegrated 1 bar MAP sensor with option to disable for external MAP sensor use, ideal for boosted applications\u003c\/li\u003e\n\u003cli\u003eFour programmable inputs and outputs for electric fans, boost control solenoids, progressive nitrous systems, and more\u003c\/li\u003e\n\u003cli\u003eAdvanced boost control options including boost vs. time, gear, RPM, speed, and built-in boost safeties\u003c\/li\u003e\n\u003cli\u003eNitrous control channels supporting wet or dry, progressive or non-progressive operation with rich\/lean safeties and closed-loop AFR targeting\u003c\/li\u003e\n\u003cli\u003eComprehensive tuning tables: four 1D tables, one 1D gear table, four 2D tables, and one 2D gear table for flexible calibration\u003c\/li\u003e\n\u003cli\u003eIncluded Bosch LSU 4.9 wideband O2 sensors for precise air\/fuel ratio monitoring and tuning accuracy\u003c\/li\u003e\n\u003cli\u003e3.5” touchscreen handheld with calibration wizard, data logging, and customizable gauge displays\u003c\/li\u003e\n\u003cli\u003eCompact ECU design measuring just 7.45” x 4.1” x 1.66” for versatile mounting options\u003c\/li\u003e\n\u003cli\u003eFree Holley EFI tuning software for full laptop access and advanced tuning capabilities\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eConstruction \u0026amp; Design:\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eThe Terminator X Max EFI Controller is engineered with durability and compactness in mind. Its rugged housing protects sensitive electronics while allowing for flexible installation in tight engine bays. The included EV6 (USCAR) injector harness ensures seamless integration with factory wiring, and vacuum hose adapters in multiple sizes (1\/8”, 1\/4”, and 3\/16”) facilitate straightforward sensor connections. Holley’s attention to detail extends to onboard diagnostic LEDs that provide instant visual feedback on critical engine parameters such as ECU power, engine run status, TPS calibration, and cam signal integrity.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eInstallation \u0026amp; Fitment:\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eInstallation is straightforward with the Terminator X Max’s plug-and-play design tailored for Chrysler GEN III HEMI engines from 2003 to 2013+. The system supports factory Drive-by-Wire throttle bodies and includes all necessary wiring harnesses and adapters for a clean, professional setup. No major modifications are required, making it an ideal upgrade for enthusiasts seeking enhanced engine control without extensive rewiring or fabrication. The compact ECU size allows for flexible mounting locations, but it is important to orient the diagnostic LEDs facing upward for proper visibility.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat's Included:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eTerminator X Max EFI Controller ECU\u003c\/li\u003e\n\u003cli\u003e3.5” touchscreen handheld controller with calibration wizard\u003c\/li\u003e\n\u003cli\u003eEV6 (USCAR) injector harness\u003c\/li\u003e\n\u003cli\u003eBosch LSU 4.9 wideband O2 sensors\u003c\/li\u003e\n\u003cli\u003eVacuum hose adapters (1\/8”, 1\/4”, and 3\/16” sizes)\u003c\/li\u003e\n\u003cli\u003eTerminated connector for external MAP sensor installation\u003c\/li\u003e\n\u003cli\u003eFree Holley EFI tuning software for laptop\u003c\/li\u003e\n\u003cli\u003eComprehensive instructions and injector support chart\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eIdeal For:\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eThe Holley EFI Terminator X Max is perfect for enthusiasts and professional tuners alike who want a reliable, feature-rich EFI controller for their GEN III HEMI-powered vehicles. It suits a wide range of builds, from naturally aspirated street machines to boosted race cars and nitrous-injected setups. Its ease of use combined with advanced tuning capabilities makes it an excellent choice for those upgrading from factory engine management or building a custom EFI system on a budget.\u003c\/p\u003e","brand":"Holley EFI","offers":[{"title":"Default Title","offer_id":47315668730068,"sku":"550-1425","price":2299.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0660\/8542\/1268\/files\/3463_1a5bd9a5dfd00979c2af40251c48461267ec6948_e2ba4f2c-babf-4428-a65e-b87736012606.webp?v=1766655086"},{"product_id":"holley-efi-gen-iii-hemi-vvt-harness-558-131","title":"Holley EFI Gen III Hemi VVT Harness: Fits Most Chrysler \/ Dodge Models (2003-2015)","description":"\u003ch3\u003eHolley EFI Harness\u003c\/h3\u003e\u003cp\u003e2009+ Dodge Gen III HEMI VVT Engines\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003e558-131\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eOverview:\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eThe Holley EFI Gen III Hemi VVT Harness is a precision-engineered wiring solution designed specifically for 2009 and newer Gen III HEMI engines equipped with Variable Valve Timing (VVT). This harness enables seamless integration with Holley’s Terminator X and Terminator X Max ECUs, allowing tuners and enthusiasts to fully control and optimize the VVT system for enhanced engine performance and efficiency. Ideal for those upgrading or building a high-performance Gen III HEMI setup, this plug-and-play harness simplifies installation while unlocking advanced tuning capabilities.\u003c\/p\u003e\u003cp\u003eBy providing direct control over the VVT solenoid located under the intake manifold, this harness ensures accurate timing adjustments that can improve throttle response, fuel economy, and overall drivability. Whether you are a professional tuner or a dedicated enthusiast, the Holley EFI VVT harness is an essential component for maximizing the potential of your Gen III HEMI engine.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eKey Features:\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eDesigned to integrate flawlessly with factory wiring and Holley EFI systems, this harness offers a range of features that enhance functionality and ease of use:\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003ePlug-and-play compatibility with the factory Gen III HEMI VVT sub-harness\u003c\/li\u003e\n\u003cli\u003eDirect connection to Holley EFI HEMI Main Harness via Power Tap and Input\/Output connectors\u003c\/li\u003e\n\u003cli\u003ePrecise control of the VVT solenoid located under the intake manifold\u003c\/li\u003e\n\u003cli\u003eIncludes three robust connectors for secure and reliable electrical connections\u003c\/li\u003e\n\u003cli\u003eSupports tuning of Variable Valve Timing for improved engine performance\u003c\/li\u003e\n\u003cli\u003eCompatible with Holley Terminator X and Terminator X Max ECU platforms\u003c\/li\u003e\n\u003cli\u003eEliminates the need for complex wiring modifications or splicing\u003c\/li\u003e\n\u003cli\u003eDurable construction designed to withstand engine bay conditions\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eConstruction \u0026amp; Design:\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eThe Holley EFI Gen III Hemi VVT Harness is built with high-quality materials to ensure durability and reliable signal transmission in demanding automotive environments. The connectors are engineered for a secure fit, resisting vibration and heat commonly found in engine compartments. The harness is designed to interface directly with the factory VVT sub-harness, maintaining OEM-level reliability while enabling advanced electronic control.\u003c\/p\u003e\u003cp\u003eAttention to detail in the wiring layout and connector design minimizes installation time and reduces the risk of electrical issues. This harness is a testament to Holley EFI’s commitment to quality and performance in aftermarket engine management solutions.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eInstallation \u0026amp; Fitment:\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eInstallation is straightforward thanks to the plug-and-play design, which connects directly to the factory Gen III HEMI VVT sub-harness and the Holley EFI main harness. No cutting or splicing of factory wiring is required, preserving the integrity of the vehicle’s electrical system. This harness is specifically designed for 2009 and newer Gen III HEMI engines equipped with VVT, ensuring perfect fitment and compatibility.\u003c\/p\u003e\u003cp\u003eProfessional installation is recommended for optimal results, especially when integrating with Holley Terminator X or Terminator X Max ECUs. Proper tuning after installation is essential to fully leverage the VVT control capabilities provided by this harness.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat's Included:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eHolley EFI Gen III Hemi VVT Harness assembly\u003c\/li\u003e\n\u003cli\u003e(3) Connectors for factory and Holley EFI harness integration\u003c\/li\u003e\n\u003cli\u003ePower Tap and Input\/Output connectors for ECU connection\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eIdeal For:\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eThis harness is ideal for automotive enthusiasts, professional tuners, and performance builders working with 2009 and newer Gen III HEMI engines who want to unlock the full potential of Variable Valve Timing. It is perfect for those upgrading to Holley EFI Terminator X or Terminator X Max ECUs and seeking a reliable, plug-and-play solution to control and tune VVT for improved engine efficiency and power delivery.\u003c\/p\u003e","brand":"Holley EFI","offers":[{"title":"Default Title","offer_id":47315668762836,"sku":"558-131","price":116.05,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0660\/8542\/1268\/files\/3464_a329ccebd082833e09b766e597319fc71723d8fe_86e87e38-a183-40cf-b385-d3067535c57d.webp?v=1766655085"},{"product_id":"holley-efi-gen-iii-hemi-vvt-and-srv-harness-558-132","title":"Holley EFI Gen III Hemi VVT \u0026 SRV Plug and Play Harness: Chrysler 300 \/ Dodge Ram (05-15 \/ 03-10)","description":"\u003ch3\u003eHolley EFI Performance Harnesses\u003c\/h3\u003e\u003cp\u003e2009+ Dodge \/ Chrysler \/ Jeep Gen III HEMI VVT Engines\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003e558-132\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eOverview:\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eThe Holley EFI Gen III Hemi VVT and SRV Plug and Play Harness is engineered specifically for 2009 and newer Gen III HEMI engines equipped with Variable Valve Timing (VVT). This harness enables seamless integration with Holley’s Terminator X and Terminator X Max ECUs, allowing precise control and tuning of the VVT system for optimized engine performance. Additionally, for vehicles retaining the factory intake manifold with the Short Runner Valve (SRV), this harness includes a dedicated sub harness to utilize the SRV actuator, enhancing low RPM torque and drivability.\u003c\/p\u003e\u003cp\u003eDesigned for enthusiasts and professional tuners alike, this plug and play solution simplifies the wiring process, ensuring reliable communication between the ECU and the engine’s advanced variable valve and intake systems. It’s an essential upgrade for anyone looking to maximize the potential of their Gen III HEMI engine with modern EFI technology.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eKey Features:\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eThis harness offers a comprehensive set of features tailored to the Gen III HEMI VVT and SRV systems:\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eDirect plug and play compatibility with the factory Gen III HEMI VVT sub-harness\u003c\/li\u003e\n\u003cli\u003eDesigned to connect seamlessly with Holley EFI HEMI Main Harness via Power Tap and Input\/Output connectors\u003c\/li\u003e\n\u003cli\u003eProvides full control of the VVT solenoid located under the intake manifold for precise valve timing adjustments\u003c\/li\u003e\n\u003cli\u003eIncludes a pre-wired SRV (Short Runner Valve) connector integrated into the sub harness\u003c\/li\u003e\n\u003cli\u003eAllows utilization of the factory SRV actuator to capitalize on low RPM torque improvements\u003c\/li\u003e\n\u003cli\u003eEliminates the need for custom wiring, reducing installation time and potential errors\u003c\/li\u003e\n\u003cli\u003eCompatible with Holley Terminator X and Terminator X Max ECUs for advanced tuning capabilities\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eConstruction \u0026amp; Design:\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eThe Holley EFI Gen III Hemi VVT and SRV Plug and Play Harness is built with high-quality automotive-grade wiring and connectors designed to withstand the harsh engine bay environment. Each connector is engineered to match factory specifications, ensuring a secure and weather-resistant connection. The harness is carefully routed and bundled to minimize interference and maintain signal integrity, supporting reliable communication between the ECU and engine components.\u003c\/p\u003e\u003cp\u003eHolley’s attention to detail in the design ensures that the harness integrates flawlessly with existing factory wiring, preserving the vehicle’s original electrical architecture while enabling advanced EFI functionality.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eInstallation \u0026amp; Fitment:\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eInstallation is straightforward thanks to the harness’s plug and play design. It connects directly to the factory Gen III HEMI VVT sub-harness and interfaces with the Holley EFI HEMI Main Harness through designated Power Tap and Input\/Output connectors. No cutting or splicing of factory wiring is required, preserving vehicle integrity and simplifying future troubleshooting or upgrades.\u003c\/p\u003e\u003cp\u003eThis harness is specifically designed for 2009 and newer Gen III HEMI engines equipped with VVT and is compatible with stock intake manifolds featuring the Short Runner Valve. It is ideal for use with Holley Terminator X and Terminator X Max ECUs, ensuring full control over VVT and SRV systems.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat's Included:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eHolley EFI Gen III Hemi VVT and SRV Plug and Play Harness\u003c\/li\u003e\n\u003cli\u003ePre-wired VVT sub-harness connector\u003c\/li\u003e\n\u003cli\u003ePre-wired SRV connector for factory SRV actuator\u003c\/li\u003e\n\u003cli\u003ePower Tap and Input\/Output connectors for Holley EFI HEMI Main Harness integration\u003c\/li\u003e\n\u003cli\u003eInstallation instructions and wiring guide\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eIdeal For:\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eThis harness is perfect for Gen III HEMI engine owners who want to upgrade to Holley EFI systems while retaining full control over factory VVT and SRV features. It is especially suited for performance enthusiasts, professional tuners, and custom builders seeking a reliable, plug and play wiring solution that unlocks the full potential of their engine’s variable valve timing and intake runner technology.\u003c\/p\u003e","brand":"Holley EFI","offers":[{"title":"Default Title","offer_id":47315668795604,"sku":"558-132","price":151.15,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0660\/8542\/1268\/files\/3465_7b76ce110cd966596f4d2a007f14495fa9756055_4ba58417-7aab-4c31-b8da-7cab7e20cf91.webp?v=1766655085"},{"product_id":"holley-efi-hemi-coolant-temperature-sensor-cts-570-228be","title":"Holley EFI Coolant Temperature Sensor: Chrysler 300 (2005-2015) \/ Dodge Ram 1500 (2003-2010)","description":"\u003ch3\u003eHolley EFI Coolant Temperature Sensor\u003c\/h3\u003e\u003cp\u003eUniversal Fitment for Holley EFI Systems\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003e570-228\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eOverview:\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eThe Holley EFI Coolant Temperature Sensor is a precision-engineered component designed to provide accurate temperature readings for your engine management system. Essential for any Holley EFI-powered vehicle, this sensor ensures your engine control unit (ECU) receives reliable data to optimize fuel delivery and ignition timing based on coolant temperature. Whether you're building a new EFI setup or servicing an existing one, this sensor is a critical part of maintaining peak engine performance and reliability.\u003c\/p\u003e\u003cp\u003eDesigned specifically for Holley EFI systems, this coolant temperature sensor integrates seamlessly with your wiring harness and ECU, delivering consistent and accurate temperature feedback. It is ideal for automotive enthusiasts, professional tuners, and engine builders who demand dependable sensor performance in their EFI applications.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eKey Features:\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eThe Holley EFI Coolant Temperature Sensor offers a range of features that make it a trusted choice for EFI enthusiasts and professionals alike:\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eGenuine Holley EFI OEM quality for reliable performance\u003c\/li\u003e\n\u003cli\u003eDesigned to work seamlessly with Holley EFI wiring harnesses and ECUs\u003c\/li\u003e\n\u003cli\u003eAccurate temperature readings to optimize engine tuning and fuel management\u003c\/li\u003e\n\u003cli\u003eDurable construction to withstand harsh engine bay conditions\u003c\/li\u003e\n\u003cli\u003eIncludes high-quality Molex 2-cavity female connector with pins, seals, and TPA for secure and weather-resistant connections\u003c\/li\u003e\n\u003cli\u003eCompatible with a wide range of Holley EFI-powered vehicles and setups\u003c\/li\u003e\n\u003cli\u003eEasy integration with Holley EFI Wiring Shop components for complete wiring solutions\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eConstruction \u0026amp; Design:\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eBuilt with durability and precision in mind, the Holley EFI Coolant Temperature Sensor features robust materials engineered to endure the demanding environment of the engine bay. The sensor element is housed within a corrosion-resistant casing that ensures long-term reliability and consistent performance. The included Molex connector assembly is crafted from high-quality materials, providing secure, weatherproof connections that resist vibration and moisture intrusion.\u003c\/p\u003e\u003cp\u003eThe sensor’s design prioritizes accurate thermal response, enabling your Holley EFI system to make real-time adjustments for optimal engine operation. This attention to detail in construction ensures dependable sensor output, which is critical for maintaining engine efficiency and preventing overheating.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eInstallation \u0026amp; Fitment:\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eInstallation of the Holley EFI Coolant Temperature Sensor is straightforward and designed to integrate seamlessly with Holley EFI wiring harnesses. The sensor connects directly to the included Molex 2-cavity female connector, which comes complete with pins, seals, and terminal position assurance (TPA) for a secure and reliable connection. This plug-and-play compatibility reduces installation time and minimizes wiring errors.\u003c\/p\u003e\u003cp\u003eThe sensor is compatible with all Holley EFI systems and can be used universally across various engine platforms equipped with Holley EFI. No special modifications are required, making it an ideal replacement or upgrade part for EFI enthusiasts and professionals.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat's Included:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eHolley EFI Coolant Temperature Sensor\u003c\/li\u003e\n\u003cli\u003eMolex 2-cavity female connector\u003c\/li\u003e\n\u003cli\u003eConnector pins\u003c\/li\u003e\n\u003cli\u003eSeals for weatherproofing\u003c\/li\u003e\n\u003cli\u003eTerminal Position Assurance (TPA) device\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eIdeal For:\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eThis coolant temperature sensor is perfect for anyone running a Holley EFI system who requires accurate and reliable temperature data for engine management. It is especially suited for:\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003ePerformance enthusiasts building or upgrading EFI-powered vehicles\u003c\/li\u003e\n\u003cli\u003eProfessional tuners seeking precise sensor feedback for engine calibration\u003c\/li\u003e\n\u003cli\u003eEngine builders and mechanics performing maintenance or repairs on Holley EFI setups\u003c\/li\u003e\n\u003cli\u003eDIY installers looking for a complete wiring solution with OEM-quality components\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Holley EFI","offers":[{"title":"Default Title","offer_id":47315668828372,"sku":"570-228","price":10.47,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0660\/8542\/1268\/files\/3466_91a6641dcddd12c6154f983eecabaa57c47be744_2bcce821-31f2-42d2-886b-24e74028800a.webp?v=1766655084"},{"product_id":"holley-efi-hi-flow-billet-fuel-rails-for-gen-iii-hemi-engines-534-284","title":"Holley EFI Hi-Flow Billet Fuel Rails: Fits Dodge Ram \/ Challenger \/ Charger \/ Durango (03-21)","description":"\u003ch3\u003eHolley EFI Hi-Flow Billet Fuel Rails\u003c\/h3\u003e\u003cp\u003e2003–2021 Dodge Ram 1500 \/ Ram 2500 \/ Ram 3500 \/ Challenger \/ Charger \/ Durango\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003e534-284\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eOverview:\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eThe Holley EFI Hi-Flow Billet Fuel Rails are engineered specifically for naturally aspirated Gen III Hemi engines, including the 5.7L, 6.1L, and 6.4L variants found in Dodge Ram trucks, Challengers, Chargers, Durangos, and Magnums from 2003 through 2021. Designed to replace the restrictive stock fuel rails, these billet rails provide increased fuel flow capacity, making them ideal for high horsepower builds and performance enthusiasts seeking reliable fuel delivery under demanding conditions.\u003c\/p\u003e\u003cp\u003eThese fuel rails offer a direct bolt-on fit, preserving factory injector clip locations to maintain proper injector spray patterns and ensure optimal combustion efficiency. Whether upgrading your street machine or preparing a race-ready setup, Holley EFI’s Hi-Flow rails deliver enhanced fuel flow with precision engineering and durable construction.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eKey Features:\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eHolley EFI’s Hi-Flow Billet Fuel Rails combine advanced design with practical features to support high-performance Gen III Hemi applications:\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eDirect fit for naturally aspirated 5.7L, 6.1L, and 6.4L Gen III Hemi engines\u003c\/li\u003e\n\u003cli\u003eMachined billet aluminum construction with a sleek black anodized finish\u003c\/li\u003e\n\u003cli\u003eLaser-etched “Holley EFI” logo for authentic branding and quality assurance\u003c\/li\u003e\n\u003cli\u003e5\/8\" diameter fuel passage for increased flow capacity over stock rails\u003c\/li\u003e\n\u003cli\u003e8 ORB ports on both ends for secure fuel line connections\u003c\/li\u003e\n\u003cli\u003e1\/8\" NPT port integrated for optional fuel pressure gauge installation\u003c\/li\u003e\n\u003cli\u003eFactory injector clip reliefs retained to allow reuse of OEM injector clips\u003c\/li\u003e\n\u003cli\u003eIncludes all necessary mounting brackets and hardware for straightforward installation\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eConstruction \u0026amp; Design:\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eCrafted from high-quality billet aluminum, these fuel rails are precision-machined to exacting tolerances to ensure a perfect fit and superior durability. The black anodized finish not only enhances corrosion resistance but also provides a clean, professional appearance under the hood. The design incorporates factory injector clip reliefs, which is critical for maintaining the injector’s radial positioning and ensuring the correct spray pattern onto the intake valves. This attention to detail helps preserve engine performance and efficiency.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eInstallation \u0026amp; Fitment:\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eThe Holley EFI Hi-Flow Billet Fuel Rails are designed as a direct replacement for the stock fuel rails on compatible Dodge vehicles equipped with Gen III Hemi engines. Installation requires no modifications to the factory fuel injectors or clips, simplifying the upgrade process. The kit includes all mounting brackets and hardware needed for a secure and reliable fit. These rails fit the following vehicles:\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eDodge Ram 1500 (2003–2010)\u003c\/li\u003e\n\u003cli\u003eDodge Ram 2500 (2003–2010)\u003c\/li\u003e\n\u003cli\u003eDodge Ram 3500 (2003–2009)\u003c\/li\u003e\n\u003cli\u003eDodge Challenger (2008–2021)\u003c\/li\u003e\n\u003cli\u003eDodge Challenger SRT (2011–2014)\u003c\/li\u003e\n\u003cli\u003eDodge Charger (2006–2021)\u003c\/li\u003e\n\u003cli\u003eDodge Durango (2004–2021)\u003c\/li\u003e\n\u003cli\u003eDodge Durango SRT (2018–2021)\u003c\/li\u003e\n\u003cli\u003eDodge Magnum (2005–2008)\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eWhat's Included:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eBillet aluminum Hi-Flow fuel rails\u003c\/li\u003e\n\u003cli\u003eMounting brackets\u003c\/li\u003e\n\u003cli\u003eAll required mounting hardware\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eIdeal For:\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eThis fuel rail upgrade is ideal for performance enthusiasts and professional builders who require increased fuel flow capacity for naturally aspirated Gen III Hemi engines. It suits high horsepower street vehicles, track cars, and any application where maintaining proper fuel delivery and injector positioning is critical. The direct-fit design makes it a practical choice for those looking to enhance fuel system performance without extensive modifications.\u003c\/p\u003e","brand":"Holley EFI","offers":[{"title":"Default Title","offer_id":47315668861140,"sku":"534-284","price":230.35,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0660\/8542\/1268\/files\/3467_f586297f2bb9346d3bafe62b814b2ab3642c50f5_f3809d28-59e7-4b20-824b-afc7d5c58dc8.webp?v=1766655084"},{"product_id":"holley-efi-geniii-hemi-smart-coils-556-162","title":"Holley EFI Gen III Hemi and Coyote Smart Coils: Chrysler 300 (2005-15) \/ Dodge Ram 1500 (2003-10)","description":"\u003ch3\u003eHolley EFI Smart Coils\u003c\/h3\u003e\u003cp\u003eLate Model HEMI and Coyote Engines\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003e556-162\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eOverview:\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eThe Holley EFI Gen III HEMI and Coyote Smart Coils represent a direct bolt-in ignition upgrade designed specifically for late model HEMI and Coyote engines. These smart coils deliver significantly more spark energy than stock ignition coils while drawing less electrical current, resulting in a hotter spark at the plug without taxing your vehicle’s electrical system. This enhanced spark energy promotes more complete combustion, maximizing fuel burn efficiency and improving overall engine performance.\u003c\/p\u003e\u003cp\u003eIdeal for enthusiasts running Holley EFI or Terminator X systems, these coils integrate seamlessly with Holley’s ignition harnesses for a straightforward plug-and-play installation. Whether you’re upgrading for improved throttle response, better fuel economy, or enhanced power delivery, Holley EFI Smart Coils provide a reliable and efficient ignition solution tailored to modern performance engines.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eKey Features:\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eHolley EFI Smart Coils offer advanced ignition technology engineered for maximum combustion efficiency and compatibility with aftermarket engine management systems. Key features include:\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eDirect bolt-on design to factory valve covers for easy installation\u003c\/li\u003e\n\u003cli\u003eIdentical wiring pinout to IGN-1A coils, enabling simple plugin upgrades (note: not compatible with factory wiring)\u003c\/li\u003e\n\u003cli\u003eHigher spark energy output than any other smart coil on the market, ensuring maximum fuel burn during combustion\u003c\/li\u003e\n\u003cli\u003eLow current draw reduces demand on the vehicle’s electrical and charging systems\u003c\/li\u003e\n\u003cli\u003eBuilt-in ignitor for seamless compatibility with Holley EFI and many other aftermarket ECUs\u003c\/li\u003e\n\u003cli\u003eMaximum operating voltage of 18 volts, supporting both 12-volt and 16-volt electrical systems commonly found in performance and race applications\u003c\/li\u003e\n\u003cli\u003eDesigned specifically for late model HEMI and Coyote engines running Holley EFI or Terminator X systems\u003c\/li\u003e\n\u003cli\u003eCompatible with Holley Smart Coil Ignition Harnesses (part #558-312) and Coil Extension Harnesses (part #558-326) for a plug-and-play upgrade\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eConstruction \u0026amp; Design:\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eHolley EFI Smart Coils are engineered with high-quality materials and precision manufacturing to withstand the rigors of high-performance environments. The coils feature robust internal components that deliver consistent spark energy while minimizing electrical resistance and heat buildup. Their direct-fit design ensures a secure and reliable mounting to factory valve covers, maintaining OEM fitment standards while providing enhanced ignition performance.\u003c\/p\u003e\u003cp\u003eThe integrated ignitor circuitry is optimized for compatibility with Holley EFI systems and a wide range of aftermarket engine management units, ensuring reliable spark timing and control under demanding conditions. This thoughtful engineering results in a durable ignition coil that supports both street and race applications.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eInstallation \u0026amp; Fitment:\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eInstallation of the Holley EFI Smart Coils is straightforward, requiring no modifications to the engine or valve covers. These coils bolt directly onto factory valve covers and feature the same wiring pinout as Holley IGN-1A coils, simplifying the upgrade process. However, they are not compatible with factory wiring harnesses and require Holley EFI or Terminator X ignition harnesses for proper operation.\u003c\/p\u003e\u003cp\u003eFor HEMI engine combinations running Holley EFI or Terminator X systems, pairing these coils with Holley Smart Coil Ignition Harnesses (part #558-312) and Coil Extension Harnesses (part #558-326) provides a true plug-and-play solution, minimizing installation time and complexity.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat's Included:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eHolley EFI Gen III Smart Coil set (quantity as required per engine)\u003c\/li\u003e\n\u003cli\u003eInstallation instructions\u003c\/li\u003e\n\u003cli\u003eNote: Ignition harnesses and coil extension harnesses sold separately\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eIdeal For:\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eThese smart coils are perfect for performance enthusiasts and professional builders upgrading late model HEMI or Coyote engines equipped with Holley EFI or Terminator X engine management systems. They are especially suited for applications requiring improved ignition energy, reduced electrical load, and reliable operation in high-demand street, strip, or race environments. If you’re seeking a bolt-in ignition upgrade that enhances combustion efficiency and supports advanced tuning capabilities, Holley EFI Smart Coils deliver a proven solution.\u003c\/p\u003e","brand":"Holley EFI","offers":[{"title":"Default Title","offer_id":47315668893908,"sku":"556-162","price":81.95,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0660\/8542\/1268\/files\/3468_a4d583ac704f8f2e0158b08aeaaa1d6fcbb53980_b26b412f-f71f-4c7c-8af9-8f86318765b5.webp?v=1766655083"},{"product_id":"holley-efi-gen-iii-hemi-smart-coils-556-163","title":"Holley EFI Gen III Hemi Smart Coils: Chrysler 300 (05-15) \/ Dodge Ram 1500 (03-10)","description":"\u003ch3\u003eHolley EFI Gen III Hemi Smart Coils\u003c\/h3\u003e\u003cp\u003eFits Most HEMI and Coyote Engines\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003e556-163\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eOverview:\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eThe Holley EFI Gen III Hemi Smart Coils are a premium ignition upgrade designed specifically for late model HEMI and Coyote engines. These coils deliver a significant improvement over stock ignition coils by producing more spark energy while drawing less electrical power. This combination results in a hotter, more efficient spark at the plug, which enhances combustion and maximizes fuel burn in each cylinder. Ideal for enthusiasts and racers looking to optimize ignition performance, these smart coils integrate seamlessly with Holley EFI and Terminator X systems for a reliable, plug-and-play upgrade.\u003c\/p\u003e\u003cp\u003eWhether you’re upgrading your street machine or building a high-performance race engine, these smart coils provide a robust ignition solution that supports both 12-volt and 16-volt electrical systems commonly found in performance and racing applications.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eKey Features:\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eHolley EFI Gen III Hemi Smart Coils offer advanced technology and thoughtful engineering to improve ignition performance and reliability. Key features include:\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eDirect bolt-on design to factory valve covers for easy installation\u003c\/li\u003e\n\u003cli\u003eSame wiring pinout as other IGN-1A coils, enabling straightforward plugin upgrades (note: not compatible with factory wiring)\u003c\/li\u003e\n\u003cli\u003eDelivers more spark energy than any other smart coil on the market, ensuring maximum fuel burn during combustion\u003c\/li\u003e\n\u003cli\u003eLow current draw reduces demand on the electrical and charging system, improving overall vehicle reliability\u003c\/li\u003e\n\u003cli\u003eBuilt-in ignitor compatible with Holley EFI and many aftermarket ECUs for versatile integration\u003c\/li\u003e\n\u003cli\u003eMaximum operating voltage of 18 volts supports both 12-volt and 16-volt electrical systems\u003c\/li\u003e\n\u003cli\u003eDesigned specifically for late model HEMI and Coyote engines, making it an ideal upgrade for these popular platforms\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eConstruction \u0026amp; Design:\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eHolley EFI smart coils are engineered with high-quality materials and precision manufacturing to ensure durability and consistent performance under demanding conditions. The coils feature robust internal circuitry that optimizes spark energy output while minimizing electrical load. Their direct bolt-on design matches factory valve cover mounting points, maintaining a clean and professional engine bay appearance. The integrated ignitor simplifies wiring and ensures reliable operation with Holley EFI systems and compatible aftermarket ECUs.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eInstallation \u0026amp; Fitment:\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eInstallation is straightforward thanks to the direct bolt-on design that fits factory valve covers on most late model HEMI and Coyote engines. These smart coils share the same wiring pinout as other IGN-1A coils, allowing for easy plug-and-play upgrades when paired with Holley EFI or Terminator X systems. For a seamless installation, Holley recommends using Smart Coil Ignition Harnesses (part #558-312) and Coil Extension Harnesses (part #558-326). Note that these coils will not work with factory wiring harnesses, so proper harnesses are essential for compatibility.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat's Included:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eHolley EFI Gen III Hemi Smart Coils (set)\u003c\/li\u003e\n\u003cli\u003eInstallation instructions (where applicable)\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eIdeal For:\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eThese smart coils are perfect for enthusiasts and professional builders upgrading late model HEMI or Coyote engines who want improved ignition performance without increasing electrical system load. They are especially well-suited for vehicles running Holley EFI or Terminator X engine management systems and those operating in high-performance or racing environments where reliable, powerful spark energy is critical.\u003c\/p\u003e","brand":"Holley EFI","offers":[{"title":"Default Title","offer_id":47315668926676,"sku":"556-163","price":646.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0660\/8542\/1268\/files\/3469_d892ec583ab2fc483a605faea7070efaf7777ba9_6682357d-973d-4d47-b154-f27a83c9cfc4.webp?v=1766655082"}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0660\/8542\/1268\/collections\/0000058_IMG_2589.webp?v=1771758375","url":"https:\/\/fasthemis.com\/collections\/holley-efi.oembed","provider":"FastHemis","version":"1.0","type":"link"}