Input and Output

Simplify your Electric Fan installation. No PCM required!!This is our new Fan Control harness and module for an easy, great-looking installation of single or dual electric fans. The fans are triggered by a thermal switch. We have standard NPT as well as...

Simplify your Electric Fan installation.This is our new Fan Control harness and module for an easy, great-looking installation of single or dual electric fans. This is a ground triggered harness, so it works out-of-the-box with Holley Sniper, Terminator...

The 558-456 wiring kit is intended to fully populate all of the inputs and outputs for PNs 553-111 and 553-112 Pro Dashes. These can easily be inserted into the existing 34 pin dash connector. It contains loose wires and 2 and 3 conductor cable (jacketed...

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

Designed to eliminate jittery tach signals when using points/tach pin B5 to provide RPM to the 7" Standalone Digital Dash