M.F. Kustoms, L.L.C.

These are made to order, and orders will take approximately 4-6 weeks to ship. Please note that any ..

$275.00

These are made to order, and orders will take approximately 4-6 weeks to ship. Please note that any ..

$275.00

** This product has been retired as we are unable to get the cam sensor anymore. **Introducing our F..

$135.00

Welcome to our Automotive EFI Consulting Service, designed to empower enthusiasts and in optimizing..

$65.00

As of January 2nd, 2026, we have put this harness on hold for production. We have been informed that..

$350.00

We’ve recreated the Ford 60-pin EEC-IV header connector, originally used on Ford’s engine control sy..

$55.00

Want to make your Holley install even more seamless? Want to use all your factory sensors?Send us yo..

$175.00

This product allows you to move your Holley ECU to a location of your choice without modifying your ..

$300.00

Holley ECU Recovery Service - Firmware Reflash ECU not powering on after a failed firmware update? ..

$45.00

This service allows you to hookup your Holley ECU to a JimStim Wheel Simulator.Features: Dual CAN Bu..

$175.00

This is a small sticker.... 1" x 2.5"Note:Item will be shipped out regular USPS post if you select t..

$1.50

Introducing our MFAdapter Bypass Ignition Harness for Holley EFI, a must-have solution for enhanced ..

$150.00

Introducing our Stepper IAC harness for standalone EFI ECUs. This allows the flexibility for owners ..

$60.00

Introducing our enhanced Ford TFI Adapter for Holley EFI, a premium solution for seamless performanc..

$125.00

Introducing our Waste Spark Coil harness for Holley EFI. This harness is designed for enthusiasts wh..

$100.00