{"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}],"url":"https:\/\/fasthemis.com\/products\/holley-efi-holley-gen-iii-hemi-hi-ram-efi-manifold-300-658","provider":"FastHemis","version":"1.0","type":"link"}