Wiring & Plugs

Injector upgrade harness for Terminator Throttle Body Systems. This harness is designed to be plug and play with our 205 lb/hr injector upgrade kit, Part Number 522-205.

Coil Harness for 2011 to 2015 Ford Coyote (5.0L) Engines

Introducing Coyote Twin Independent Variable Cam Timing Control from Holley EFI! Do you have a coyote crate engine going in your dream car? Is your weekend road race warrior powered by a coyote junkyard engine with locked cams? Unlock the full potential...

Similar to the changes with the cam and crank sensors, the Drive-By-Wire throttle pedal connector was changed in 2008 on cars while the trucks changed in the 2007 models. Interestingly, the throttle body connector is consistent on all engines. The early...

Ford V8 Injector Harness for Ford USCAR / EV6 style Fuel Injectors (Evenly Spaced)

Similar to the changes with the cam and crank sensors, the Drive-By-Wire throttle pedal connector was changed in 2008 on cars while the trucks changed in the 2007 models. Interestingly, the throttle body connector is consistent on all engines. The early...

Ford V8 Injector Harness for Jetronic "Bosch" style Fuel Injectors (Evenly Spaced)

The Holley EFI Can Adapter/Power Harness adapts two pin Holley main harness CAN connectors to new style 4 pin CAN devices.

This harness provides a plug and play upgrade solution for those seeking to convert to Coil-On-Plug. Additionally we have pre-installed a Power Tap for easy access to 12v, 5v Reference, and Sensor Grounds. The Ford MPFI C-O-P Main Harness has also been...

If you already have your own wire and simply need the connectors and pins, we have you covered with our new ECU connector and pins kit, allowing you to fully terminate your own custom main harnesses!

Used when adding a second wide band oxygen sensor to a Dominator EFI installation.