Holley EFI Gen III HEMI Drive-By-Wire Harness: Chrysler 300 (05-15) / Dodge Ram 1500 (03-10)

Holley EFI Drive-By-Wire Harness

2007–Present Gen III HEMI Engines - Late Pedal

558-418

Overview:

The 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.

Designed 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.

Key Features:

Built to deliver reliable and efficient engine management, the Holley EFI Drive-By-Wire Harness offers the following key features:

• Designed specifically for Gen III HEMI engines with late-model drive-by-wire throttle pedal connectors
• Enables full control of fuel and spark via Holley EFI for precise tuning and performance gains
• Compatible with power adders including nitrous oxide, superchargers, turbos, as well as methanol and water injection systems
• Utilizes TXL grade copper wiring for minimal weight and high-temperature resistance
• Factory-style terminations ensure strong, secure, and reliable electrical connections
• OEM-grade connectors provide a correct, positive fit for seamless integration
• Harness is routed through a split-loom braid for enhanced protection and a clean, professional appearance
• Maintains consistent throttle body connector design across all Gen III HEMI engines for simplified installation

Construction & Design:

The 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.

To 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.

Installation & Fitment:

Installation 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.

It 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.

What's Included:

• Holley EFI Gen III HEMI Drive-By-Wire Harness with late pedal connector
• Split-loom protective braid covering the entire harness length
• OEM-grade connectors and factory-style terminations

Ideal For:

This 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.