Performance Parts

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!

Introducing 2x4 Terminator Stealth EFI upgrade components. The wait is over. These upgrade components allow you to use your current Terminator Stealth EFI throttle body, install a new main harness, and slave throttle body, and you are finished. This...

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

Holley EFI LS wires are designed to work with Hooker shorty headers to prevent burns resulting in misfires.

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...

The Holley Dominator ECU has built in capability to control dual Drive-By-Wire Chrysler Throttle Bodies - OEM P/N 53034251ABAdditionally, this harness requires pedal assembly part number 0486 1714.

Holley EFI Universal "Cut-to-Fit" spark plug wire sets for GM Ls Engines come with the spark plug terminal and boot installed with the Coil end unterminated. Coil cap boots and terminals are included so you can cut the wire to the desired length, then...

High Current Water Methanol Solenoid Driver

Ford TFI Ignition Adapter Harness

Take your forced induction ride to the next level with a Holley water/meth injection system! Integrated into the Holley HP and Dominator EFI Systems is the capability to control water/methanol injection, allowing you to safely run on lower octane pump...

This sensor is designed to trigger from a ferrous metal (magnetic steel) target, such as Holley's 60-2 crank trigger wheels. It can also be used for a cam sensor trigger and other applications.