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Holley EFI Systems Wiring Harnesses 558-101 Harnesses, EFI, Replacement Harness, Multi-Port, Speed Density Metered, for Avenger, HP, Dominator, Systems, with Stealth Ram, Each

Holley EFI Systems Wiring Harnesses 558-101 Harnesses, EFI, Replacement Harness, Multi-Port, Speed Density Metered, for Avenger, HP, Dominator, Systems, with Stealth Ram, Each

A$1,745.22
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

EFI Wiring Harness - TPI Stealth Ram - Main Harness - Avenger EFI / HP EFI / Dominator EFI - Various GM Applications - Each


Data: v2 - Desc: v4.2 - Upd: 2026-11-08 02:17:26

Data: v4.2 - Upd: 2026-11-08 06:31:04

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 hly558-101
SFX Item ID 4784453
Accounting SKU hly-558-101
Manufacturer SKU 558-101
Manufacturer UPC 090127666715
Alternative References 558-101, HLY-558-101, HOL558-101

Wiring Harnesses, Holley EFI, Replacement Harness, Multi-Port, Speed Density Metered, for Avenger, HP, Dominator, EFI Systems, with Stealth Ram, Each

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.

Product Attributes
BrandHolley
Manufacturer's Part Number558-101
Part TypeFuel Injection System Wiring Harnesses
Product LineHolley EFI Systems Wiring Harnesses
UPC090127666715
Fuel Injection StyleMulti-port
Metering StyleSpeed density
QuantitySold individually.
NotesReplacement main harness for Holley Avenger EFI, HP EFI, and Dominator EFI fuel injection systems using the Stealth Ram setup.

Compatibility

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