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)

You May Also Like

ARP Special Chaser Taps

ARP has expanded its tap offerings to include some 22 different sizes.

ARP chaser taps

Properly preparing engine blocks, cylinder heads and other components for assembly should include thoroughly cleaning all threaded apertures. Debris can severely compromise accurately preloading a fastener, which is why ARP offers specially designed “chaser” taps.

These taps are not designed to cut threads; only clean them. ARP has expanded its tap offerings to include some 22 different sizes (SAE and metric), plus combination sets that feature the most popular sizes.

Summit Racing Forged Pro Pistons

Made in the USA, Summit Racing Forged Pro Pistons are made using ultra-modern technology and materials so they’re stronger and lighter.

CP-Carrillo Pistons and Rods for VW/Audi

This piston and rod combination is designed as a perfect fit and meant to withstand large boost levels.

Eneos Racing Pro 10w-50 Oil

With Racing Pro 10w-50, a 50/50 ester mix provides exceptional wear protection, extra high horsepower, and further anti-oxidation stability.

Eneos 10w-50 motor oil
Fluidampr Performance Damper for Mazda Miata

Fluidampr performance dampers protect your engine from destructive crankshaft torsional vibration.

Fluidampr Mazda Miata damper

Other Posts

Mahle PowerPak Pistons for 6.0L and 6.4L Powerstroke Engines

All four sets offer incredible versatility, allowing a daily driver to become a weekend warrior for drag, dyno, or pulling competitions.

Point One Small Block Chevy Head Stud Kit

Point One’s E190 head studs boast an impressive 190,000 psi nominal tensile strength.

Cadillac Supercharged LS engine
Weinle Motorsports Sheet Metal Intakes

These custom aluminum sheet metal intakes are built to your specs.

Peterson Fluid Systems’ Fat Boy Dirt Late Model Oil Tank

Peterson Fluid Systems’ new 08-0919 Fat Boy Dirt Late Model Oil Tank provides engine builders with more oil capacity when chassis space is limited. With a lower profile design and all the standard features of their race-proven DLM tanks, this tank is 18.62” tall with a 5-gallon capacity. Related Articles – Total Seal Severe-Duty High-Performance Diesel Rings