4.7 · 3 reviews
SKU: 558-128

EFI Ford Foxbody Main Harness

$562.99
FREE delivery
Description

ABOUT THIS PRODUCT

This harness is for fuel injected small block ford engines such as 5.0L or 5.8L Windsor powerplants. Plug and play ignition capability with Dual Sync and HyperSpark Distributors. The 5.0L Ford main harness is pre-terminated with Ford PWM IAC connector for the OEM PWM - idle air control motor commonly found on late 80's and early 90's engines. Compatible with Holley EFI Dominator, HP, and Terminator X and X Max ECU's.

Product Features:
  • Designed for use with fuel injected small block ford engines
  • Plug and play ignition capability with Dual Sync and HyperSpark distributors
  • Compatible with Holley EFI Dominator, HP, and Terminator X and X Max ECU's
  • Comes pre-terminated with Ford PWM IAC connector for OEM PWM - idle air control motors
  • For OEM Ford fuel injectors, use injector harness 558-209
  • For TFI distributor applications, use ignition adapter 558-305
Specifications
Brand
Holley EFI (770)
SKU
558-128
Product type
Automotive
Guides & Resources
User Guide
Returns Policy
Shipping Information

Free shipping on all orders. Most items ship next business day after your order is placed.

Returns Policy

Returns are accepted when the product is in its original, unopened container. Contact us if you have questions about your order.

View full returns policy

Customer Reviews

4.7

Based on 3 reviews

52
41
30
20
10
R
Riley N. Verified Buyer
06/08/2025

No complaints

Quick delivery and the product exceeded my expectations.

M
Maria K. Verified Buyer
08/17/2025

Would buy again

Does what it is supposed to do. Happy with this purchase.

T
Ted R. Verified Buyer
02/03/2025

Works perfectly

Setup was simple and it has worked reliably since day one.

Share your thoughts