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Holley 558-321

Holley Factory Replacement LS Coil Harness


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Holley Factory Replacement LS Coil Harness $134.95
Out of stock
4 left in stock
Factory Replacement LS Coil Harness
  • Stock LS Coils
  • Works with Holley EFI Main Harnesses with Coil-On-Plug Connectors
  • Holley 558-321 Details

    Ignition Harness

    Holley EFI LS coil harness is designed to replace factory harnesses that are old and weathered.  Intended for use with factory GM style coils, LS coil harnesses will work with Holley EFI main harnesses with coil-on-plug connectors. Built with high-quality materials, coil harnesses are protected with a Techflex F6 wire loom that is abrasion resistant and gives clean looks.


    • OEM connectors
    • Techflex F6 braided wire looms
    • Replace damaged factory harnesses
    • Works with Holley EFI main harnesses with coil on plug connectors
    • Completely plug and play


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    All Holley EFI Wiring Needs

    Holley EFI wiring harnesses are used with Holley's Avenger, HP and Dominator EFI Systems. EFI harnesses for various Holley systems can consist of a main harness, transmission harness (if applicable),  injector harness, ignition/coil harness, and auxiliary harnesses to access features of your Holley EFI system.


    558-321 is rated 5.0 out of 5 by 1.
    Rated 5 out of 5 by from nice harness fits good for aftermarket install got these to connect the ignition in my bracket car with an ls conversion they fit nice.
    Date published: 2018-12-26
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    Some parts are not legal for use in California or other states with similar laws / regulations

    Motor Vehicles

    WARNING: Motor vehicles contain fuel, oils and fluids, battery posts, terminals and related accessories which contain lead and lead compounds and other chemicals known to the State of California to cause cancer, birth defects and other reproductive harm. These chemicals are found in vehicles, vehicle parts and accessories, both new and as replacements. When being serviced, these vehicles generate used oil, waste fluids, grease, fumes and particulates, all known to the State of California to cause cancer, birth defects, and reproductive harm.


    WARNING: Some dust created by power sanding, sawing, grinding, drilling, and other construction activities contains chemicals known to the State of California to cause cancer and birth defects or other reproductive harm. Some examples of these chemicals are: lead from lead-based paints, crystalline silica from bricks and cement and other masonry products, and arsenic and chromium from chemically treated lumber. Your risk from exposure to these chemicals varies, depending on how often you do this type of work. To reduce your exposure, work in a well-ventilated area and with approved safety equipment, such as dust masks that are specially designed to filter out microscopic particles.

    Electrical Cords

    WARNING: The wires of these products contain chemicals known to the State of California to cause cancer and birth defects or other reproductive harm. Wash hands after handling.