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Holley Terminator EFI HyperSpark Ignition Adapters 558-323 Wiring Harnesses, EFI, Adapter, Plug-and-Play, Main Harness to X System, Each

SKU: HLY558-323

Wiring Harnesses

Holley Terminator EFI HyperSpark Ignition Adapters 558-323 Wiring Harnesses, EFI, Adapter, Plug-and-Play, Main Harness to X System, Each

SKU: HLY558-323

Wiring Harnesses
A$102.09
IN STOCK! Est Ship 3-7 Days days. In stock at 2 locations (more than 10 available)

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Description

EFI Wiring Harness - Ignition Adapter Harness - HyperSpark Distributors to Holley EFI - Each


Data: v2 - Desc: v4.2 - Upd: 2026-11-08 02:16:47

Data: v4.2 - Upd: 2026-11-09 19:41:48

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 hly558-323
SFX Item ID 4783865
Accounting SKU hly-558-323
Manufacturer SKU 558-323
Manufacturer UPC 090127073445
Alternative References 558-323, HLY-558-323, HOL558-323

Wiring Harnesses, Holley EFI, HyperSpark Ignition Adapter, Plug-and-Play, Holley Main Harness to Terminator X EFI System, Each

Holley Terminator EFI HyperSpark ignition adapters are designed to plug-and-play with HyperSpark distributors and Holley EFI main harnesses with an ignition connector. They enable you to run a "timed sequential" fuel strategy for faster responses and cleaner emissions. Complete the improvement of your driving experience with a Holley Terminator EFI HyperSpark ignition adapter.

Product Attributes
BrandHolley
Manufacturer's Part Number558-323
Part TypeWiring Harnesses
Product LineHolley Terminator EFI HyperSpark Ignition Adapters
UPC090127073445
Fuse Block IncludedNo
QuantitySold individually.
NotesDesigned to plug-and-play HyperSpark distributors and Holley EFI main harnesses with ignition connector.
Special AttentionUsed to run a "timed sequential" fuel strategy, with Holley EFI V5 Build 160 or Later, or Terminator X.

Compatibility

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