Holley LS Coil Harnesses 558-321 Ignition Wiring Harnesses, EFI, Replacement, Harness, Plug-and-Play, OE Connectors, Not for LS1/LS6, Chevy, Engine, Pair
Holley LS Coil Harnesses 558-321 Ignition Wiring Harnesses, EFI, Replacement, Harness, Plug-and-Play, OE Connectors, Not for LS1/LS6, Chevy, Engine, Pair
Description
Ignition Wiring Harness - Factory Replacement - Injector Sub Harness - GM LS-Series - Pair
Data: v2 - Desc: v4.2 - Upd: 2026-11-08 02:16:46
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.
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 | hly558-321 |
| SFX Item ID | 4783852 |
| Accounting SKU | hly-558-321 |
| Manufacturer SKU | 558-321 |
| Manufacturer UPC | 090127030745 |
| Alternative References | 558-321, HLY-558-321, HOL558-321 |
Ignition Coil Wiring Harnesses, Holley EFI, Replacement, LS Coil Harness, Plug-and-Play, OE Connectors, Not for LS1/LS6, Chevy, LS Engine, Pair
Holley LS coil harnesses are factory replacements for stock LS coils. These EFI LS coil sub harnesses are intended to be used with factory LS coils and various Holley EFI main harnesses with coil-on-plug connectors. They are built with the same high-quality connectors and wire loom found on all Holley EFI harnesses, guaranteeing a perfect match in your engine bay. Are you tired of scouring the junkyard for stock LS coil sub harnesses? Holley has the solution.
Holley LS coil harnesses feature:
• OEM connectors provide a secure connection between your ECU and Ignition Coils
• Techflex F6 braided wire loom keeps your engine bay looking clean, while providing abrasion resistance
• Plug-and-play fitment
• Can be used to replace a damaged factory coil harness
| Product Attributes | |
|---|---|
| Brand | Holley |
| Manufacturer's Part Number | 558-321 |
| Part Type | Ignition Coil Wiring Harnesses |
| Product Line | Holley LS Coil Harnesses |
| UPC | 090127030745 |
| Quantity | Sold as a pair. |
| Notes | For use with the Holley Smart Coils 556-112. |
Compatibility
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