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Holley EFI Systems Wiring Harnesses 550-616N Engine Management Systems, HP EFI, ECU and Harness, Up to 16-Injectors, 8-Coils, NTK O2, Wideband, Ford, Lincoln, Mercury, 2-valve, 4.6L, 5.4L, Kit

Holley EFI Systems Wiring Harnesses 550-616N Engine Management Systems, HP EFI, ECU and Harness, Up to 16-Injectors, 8-Coils, NTK O2, Wideband, Ford, Lincoln, Mercury, 2-valve, 4.6L, 5.4L, Kit

A$7,025.30
Special Order. Contact for ETA. This item is out of stock in our warehouse and partner distribution centres. In some cases, this may be due to not having live inventory feeds available for all suppliers. Please contact us before ordering if you need to meet a specific deadline.
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Description

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

Fuel Injection System Wiring Harnesses

Data: v4.2 - Upd: 2026-10-13 18:47:38

Specifications

Product Attributes - Brand
Holley
Product Attributes - Manufacturer's Part Number
550-616N
Product Attributes - Part Type
Fuel Injection System Wiring Harnesses
Product Attributes - Product Line
Holley EFI Systems Wiring Harnesses
Product Attributes - UPC
090127716113
Product Attributes - Fuel Injection Style
Multi-port
Product Attributes - Metering Style
Mass airflow
Product Attributes - Quantity
Sold as a kit.
Product Attributes - Notes
Interfaces a Holley EFI ECU to a 2-valve Ford Modular engine. Designed to be used in conjunction with an injector harness, a coil harness, and ignition modules. Allows accurate control of fuel and ignition along with additional controls for nitrous, boost or water/methanol. Uses most stock sensors; includes HP ECU, Jetronic “Bosch Style” injector harness, and NTK oxygen sensor.

Reference Information

Brand Name/s Holley
StreetFX SKU hly550-616N
SFX Item ID 4783373
Supplier Item Code 4783373
Manufacturer SKU 550-616N
Manufacturer UPC 90127716113
Alternative References HOL550-616N, 16-Injectors, 8-Coils, O2, 2-valve, 4.6L

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

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