EFI Harnesses Archives - Engine Builder Magazine
Howell EFI LT1/LT4 and EcoTec3 Harnesses for Classic Cars

Howell EFI harnesses are designed to transplant powerful engines into an unlimited number of applications from Street Rod, Pro-Touring, Off-Road, Sand Rails, Street Machines, and more.

Howell EFI
Terminator X EFI Supports Gen III HEMI VVT, SRV & 46RE Transmissions

Now, both Terminator X and Terminator X Max ECUs will allow you to control and tune the VVT with the use of the plug and play VVT harness.

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.