Free shipping on orders over $100 - Details
ASK OUR EXPERTS
1-866-464-6553
Holley EFI

Universal MPFI Main Harness

Universal MPFI Main Harness for HP EFI & Dominator EFI

Part # 558-104 Be the first to write a review
Estimated shipping date: 09/30/2021
Email When Available
Your Price
$403.95
Suggested Retail
$449.00
Add to Wish List
Starting at $36 a month with Learn More
Universal MPFI Main Harness for HP EFI & Dominator EFI

About Holley EFI

Holley is the new standard in EFI! Whether you're engine swapping your classic car or need to manage 4000 horsepower in your twin-turbocharged drag radial race car, Holley EFI has the solutions you need to get your project up and running better than ever!

Brand Holley EFI
Emission Code3
Harness ApplicationFord
GM
Universal
Harness TypeMain
Product TypeUniversal MPI Main Engine Harness
UPC090127666746
Part Number558-104
3

This part is legal for sale and use on Uncontrolled (Non-Emissions Controlled) Vehicles and Racing Use Only Vehicles.

The following vehicles are considered Uncontrolled (Non-Emissions Controlled) Vehicles:

  • 1965 and older U.S. manufactured California Certified vehicles
  • 1967 and older U.S. manufactured Federally Certified vehicles
  • 1967 and older Foreign manufactured vehicle

The following vehicles are considered Racing Use Only Vehicles:

  • Racing Use Only Vehicles are vehicles that are used exclusively for competition and that are not registered and that may never be used on the street

WARNING: It is against the law to install this part on an Emissions Controlled Vehicle

The following vehicles are considered Emissions Controlled Vehicles:

  • 1966 and newer U.S. manufactured California Certified vehicles
  • 1968 and newer U.S. manufactured Federally Certified vehicles
  • 1968 and newer Foreign manufactured vehicle
Holley EFI Dealers
Do you need a custom kit built for your application? Do you need a system installed and tuned? Click here to find the Holley EFI dealer in your area!
Wiring Shop Quick Reference Guide
Wiring Shop Quick Reference Guide
Reviews

    *Free Shipping & Handling only offered to the contiguous US on orders over $100, excludes clearance parts and oversized packages.

    Some parts are not legal for use in California or other states with similar regulations.