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Holley

Holley EFI Systems Wiring Harnesses 558-108 Harnesses, EFI, Ford 2V/4V Modular, Main Harness, Multi-port Fuel Injection, for HP, Dominator, Systems, Ford, 4.6-5.4L, Each

SKU: HLY558-108

Fuel Injection System Wiring Harnesses
Holley EFI Systems Wiring Harnesses 558-108 Harnesses, EFI, Ford 2V/4V Modular, Main Harness, Multi-port Fuel Injection, for HP, Dominator, Systems, Ford, 4.6-5.4L, Each

Holley

Holley EFI Systems Wiring Harnesses 558-108 Harnesses, EFI, Ford 2V/4V Modular, Main Harness, Multi-port Fuel Injection, for HP, Dominator, Systems, Ford, 4.6-5.4L, Each

SKU: HLY558-108

Fuel Injection System Wiring Harnesses
A$2,013.19
LAST ONE! Est Ship 4-7 days. LAST ONE! This is the last unit at our distribution centre. Contact us if you need more. The ETA is the approximate time required to prepare your order for dispatch.
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Description

IMPORTANT NOTICE: Designed to fit Holley HP EFI or Dominator EFI only, will not work with factory ECU.

Holley offers a variety of direct replacement EFI wiring harnesses, including multi-port, sequential, and throttle body injection styles. These units are made with premium components to ensure better reliability and performance for your ride--and they're compatible with many engine swaps. Holley EFI systems wiring harnesses are sold individually or as a kit; choose the model needed for your fuel injection application.

Part Type

Main Harness 99-04 Ford Modular Engine

Data: v4.2 - Upd: 2026-10-13 18:46:54

Specifications

Product Attributes - Brand
Holley
Product Attributes - Manufacturer's Part Number
558-108
Product Attributes - Part Type
Fuel Injection System Wiring Harnesses
Product Attributes - Product Line
Holley EFI Systems Wiring Harnesses
Product Attributes - UPC
090127712863
Product Attributes - Fuel Injection Style
Multi-port
Product Attributes - Quantity
Sold as a kit.
Product Attributes - Notes
Designed to fit Holley HP EFI or Dominator EFI only, will not work with factory ECU.

Reference Information

Brand Name/s Holley
StreetFX SKU hly558-108
SFX Item ID 4784144
Supplier Item Code 4784144
Manufacturer SKU 558-108
Manufacturer UPC 90127712863
Alternative References HOL558-108, 2V/4V, 4.6-5.4L

Compatibility

Application Data
  • Stock EFI SystemNo
    EFI System ManufacturerHolley
    UniversalNo
    MakeFORD
    Beginning Year1999
    Ending Year2004
    Engine TypeV8
    Engine Size4.6L/281
    Engine FamilyFord modular V8
  • Stock EFI SystemNo
    EFI System ManufacturerHolley
    UniversalNo
    MakeFORD
    Beginning Year1999
    Ending Year2004
    Engine TypeV8
    Engine Size5.4L/330
    Engine FamilyFord modular V8
  • Stock EFI SystemNo
    EFI System ManufacturerHolley
    UniversalNo
    MakeLINCOLN
    Beginning Year1999
    Ending Year2004
    Engine TypeV8
    Engine Size4.6L/281
    Engine FamilyFord modular V8
  • Stock EFI SystemNo
    EFI System ManufacturerHolley
    UniversalNo
    MakeLINCOLN
    Beginning Year1999
    Ending Year2004
    Engine TypeV8
    Engine Size5.4L/330
    Engine FamilyFord modular V8
  • Stock EFI SystemNo
    EFI System ManufacturerHolley
    UniversalNo
    MakeMERCURY
    Beginning Year1999
    Ending Year2004
    Engine TypeV8
    Engine Size4.6L/281
    Engine FamilyFord modular V8

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