{"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","url":"https:\/\/fasthemis.com\/products\/holley-efi-gen-iii-hemi-vvt-harness-558-131","provider":"FastHemis","version":"1.0","type":"link"}