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Holley EFI

Holley EFI 558-128 Engine Main Harness

Part # 558-128 Be the first to write a review

Compatible with 1986-2000 Ford® Fuel Injected 5.0L/5.8L Small Block Engines. This product is not created or sold by Ford®.

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Holley EFI 558-128 Engine Main Harness

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$525.95

This harness is for fuel injected small block engines, such as 5.0L, or 5.8L Windsor powerplants. Plug and play ignition capability with Dual Sync and HyperSpark Distributors, ignition adapter 558-305 is required for applications with a TFI distributor. 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.

Features:

  • Designed for use with 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, for ignition adapter 558-305 is required for applications with a TFI distributor
  • 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 use with OEM Ford fuel injectors, use injector harness 558-209.
Brand Holley EFI
Emission Code4
Product TypeEngine Main Harnesses
WarrantyManufacturer's Limited 90 Day (1 Year with Warranty Registration)
UPC090127074428
Manufacturer Part Number558-128
Part Number558-128
4

This part is legal for sale or use on Racing Use Only Vehicles

The following vehicles are considered Racing Use Only Vehicles:

  • Racing Use Only Vehicles are vehicles that are used exclusively for competition 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

Instructions for 558-128
EFI selection chart
Manufacturer's Limited 90 Day (1 Year with Warranty Registration): See Details

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    Holley EFI 558-128 Engine Main Harness
    Holley EFI 558-128 Engine Main Harness
    $525.95