Street. Track. Everything between.
07 3276 7829
Your garage Find parts for your vehicle Select year, make and model to narrow your search.

Holley EFI Benchtop Harnesses 558-127 Wiring Harnesses, EFI, Harness, Test Harness, Input Connectors, Power Switch, for HP, Dominator, Terminator, Sniper ECUs, Each

Holley EFI Benchtop Harnesses 558-127 Wiring Harnesses, EFI, Harness, Test Harness, Input Connectors, Power Switch, for HP, Dominator, Terminator, Sniper ECUs, Each

A$565.84
LAST ONE! Est Ship 4-7 days. In stock at 2 locations (4 available)

Added to cart

We accept
American Express
Mastercard
Visa
PayPal Checkout
Direct Deposit
Afterpay
Apple Pay
Google Pay
Zip Pay

Description

Wiring Harness - Bench Top Test - Holley EFI - Each


Data: v2 - Desc: v4.2 - Upd: 2026-11-08 02:16:20

Data: v4.2 - Upd: 2026-11-08 06:32:48

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 hly558-127
SFX Item ID 4783448
Accounting SKU hly-558-127
Manufacturer SKU 558-127
Manufacturer UPC 090127136768
Alternative References 558-127, HLY-558-127, HOL558-127

Wiring Harnesses, Holley EFI, Benchtop Harness, Test Harness, EFI Input Connectors, Power Switch, for HP, Dominator, Terminator, Sniper ECUs, Each

Holley EFI benchtop harnesses are designed for benchtop testing and setup of HP, Dominator, Terminator X, Terminator X Max, and Sniper ECU's, as well as 7 in. dashes. They are great for ECU diagnostics that do not require a running engine, firmware updates, or 7 in. dash calibrations. The harness has pre-terminated connectors for the following sensor inputs: CAN, Crank, Cam, TPS, Input (1), P1A, Main Power, and Sniper EFI connectors for a Sniper main harness. Also includes a power switch for quick setup in your workspace. Power and ground flying leads need to be connected to your battery or power supply (not included).

Key features:
• Terminated connectors for multiple EFI inputs
• Included power switch allows for a quick "install" on your test bench
• Optimal for ECU diagnostic, firmware updating, and pre-configuring dash layouts
• Works with HP, Dominator, Terminator X, Terminator X Max, and Sniper ECU's, as well as 7 in. dashes
• Has pre-terminated connectors for these sensor inputs: CAN, Crank, Cam, TPS, Input (1), P1A, Main Power, and Sniper EFI main harness connectors

Product Attributes
BrandHolley
Manufacturer's Part Number558-127
Part TypeFuel Injection System Wiring Harnesses
Product LineHolley EFI Benchtop Harnesses
UPC090127136768
QuantitySold individually.
NotesDesigned for benchtop testing and setup of HP, Dominator, Terminator X, Terminator X Max, Sniper ECU's and 7.000 in Holley Dashes.

Compatibility

Loading compatibility information...