Holley Gen III HEMI EFI Harnesses - Engine Builder Magazine

Holley Gen III HEMI EFI Harnesses

Holley has announced the release of plug-and-play wiring harnesses to use its HP and Dominator EFI systems with Gen III HEMI engines, including the '03-'10 5.7 & 6.1L, '11-present 6.4L "392", and Gen III 426 crate engines. These Holley EFI harnesses provide a plug-and-play solution for the main, injector, ignition coil, and drive-by-wire harnesses needed to fire up your Gen III HEMI with Holley EFI control.

35593a91-f097-4969-a908-145e21ead1b9Holley has announced the release of plug-and-play wiring harnesses to use its HP and Dominator EFI systems with Gen III HEMI engines, including the ’03-’10 5.7 & 6.1L, ’11-present 6.4L “392”, and Gen III 426 crate engines.

These Holley EFI harnesses provide a plug-and-play solution for the main, injector, ignition coil, and drive-by-wire harnesses needed to fire up your Gen III HEMI with Holley EFI control. The main, ignition coil and drive-by-wire harnesses are available for all Gen III HEMIs. Be sure to check out Holey’s EFI selection guide to ensure that you get the correct harnesses for your engine. The harnesses utilize TXL grade copper wiring, factory style terminations, OEM-grade connectors, and high-quality braided wire loom.

With Holley EFI, HEMI owners can take full control of their fuel & spark, as well as power adders such as superchagers, turbos, nitrous, and water/meth injection. The self-tuning fuel strategies and intuitive software make maximizing the performance from your HEMI-powered vehicle easier than ever.

For more information, click HERE.

  • Main Harness Early Crank/Cam (P/N 558-106)
  • Main Harness Late Crank/Cam (P/N 558-107)
  • Injector Harness, USCAR (P/N 558-210)
  • Injector Harness, Jetronic (P/N 558-211)
  • Coil Harness, Early FCI (P/N 558-310)
  • Coil Harness, Late Tyco (P/N 558-311)
  • DBW Harness, Early Tyco (P/N 558-417)
  • DBW Harness, Late Molex (P/N 558-418)

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