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Holley Dominator EFI Auxiliary Harnesses 558-402 Fuel Injection Systems Wiring Harnesses, EFI, J2B Harness, 8 Additional Inputs, 23 Outputs, Connector Included, Kit

Holley Dominator EFI Auxiliary Harnesses 558-402 Fuel Injection Systems Wiring Harnesses, EFI, J2B Harness, 8 Additional Inputs, 23 Outputs, Connector Included, Kit

A$447.52
LOW STOCK! Est Ship 4-7 days. In stock at 2 locations (more than 10 available)

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Description

EFI Wiring Harness - J2B Auxiliary Connector Harness - Holley Dominator EFI - Universal - Kit


Data: v2 - Desc: v4.2 - Upd: 2026-11-08 02:16:03

Data: v4.2 - Upd: 2026-11-08 06:33:27

Features

Vehicle Compatibility and Return Conditions.

This item was designed and engineered in the USA for US domestic vehicles. OBD tools, ECUs, dongles, programmers, and tuners may have limited compatibility with vehicles outside the USA due to regional differences in emission standards and system configurations. Some features and functionality may vary depending on the vehicle and location.

Some electronic tuning devices and programmers require activation, registration, or pairing with a specific vehicle’s VIN (Vehicle Identification Number). Once activated or paired, these devices may become permanently associated with that vehicle, restricting or preventing their use on another vehicle, resticting our ability to offer returns or exchanges.

Please review the product details and images to ensure it meets your needs. For clarification or assistance, feel free to contact a StreetFX agent. Note: Returns are not accepted for special order or tuning products unless the unit is deemed faulty.

(keyword: efi)

Images are supplied by the manufacturer and may be generic. While all efforts are made to provide accurate pictures, there may be differences in the actual product, such as colour, quantity, version, or included components. Please carefully review the description and specifications for details on inclusions or any variations. Some items may be sold individually or in sets, and images may occasionally depict additional products or quantities not included in your purchase. For assistance or clarification, please contact customer support.

Specifications

Reference Information

Reference Data (Provide these details to our support team)
Brand Name/s Holley, Hilborn, Holley Efi, Retrobright, Terminator X
StreetFX SKU hly558-402
SFX Item ID 4783204
Accounting SKU hly-558-402
Manufacturer SKU 558-402
Manufacturer UPC 090127666432
Alternative References 558-402, HLY-558-402, HOL558-402

Fuel Injection Systems Wiring Harnesses, Dominator EFI, J2B Auxiliary Harness, 8 Additional Inputs, 23 Outputs, Connector Included, Kit

Holley has put together a choice of several Dominator EFI auxiliary harnesses. These kits include the loose wires, connectors, inputs, and outputs needed to configure and customize your Dominator EFI system to meet your performance needs.

Product Attributes
BrandHolley
Manufacturer's Part Number558-402
Part TypeFuel Injection System Wiring Harnesses
Product LineHolley Dominator EFI Auxiliary Harnesses
UPC090127666432
QuantitySold as a kit.
NotesIncludes J2B ECU connector, four additional injector driver outputs, four additional coil driver outputs, and 23 user programmable outputs.

Compatibility

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