{"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","url":"https:\/\/fasthemis.com\/products\/holley-efi-gen-iii-hemi-vvt-and-srv-harness-558-132","provider":"FastHemis","version":"1.0","type":"link"}