Skip to Product Info
    • Speed Engineering LS Ignition Coil Harness 31-1018
    • Speed Engineering LS Ignition Coil Harness 31-1018
    • Speed Engineering LS Ignition Coil Harness 31-1018
    • Speed Engineering LS Ignition Coil Harness 31-1018
    • Speed Engineering LS Ignition Coil Harness 31-1018
    • Speed Engineering LS Ignition Coil Harness 31-1018
    New!

    Speed Engineering LS Ignition Coil Harness — 4-Coil Bank Harness | D51OC/D514A Coil Compatible | 31-1018

    Part Number: 31-1018
    Regular Price $19.99

    In Stock

    Not sure it fits your vehicle?
    Email sales@berryperformancesales.com with your year, make, model and engine, and we'll help you check fitment before you order.
    Fast Fulfillment: In-stock orders typically ship within 1 to 2 business days.
    Free Shipping on Orders Over $99 | Excludes freight shipments
    International Shipping Available: email sales@berryperformancesales.com for a quote.
    Payment & Security

    Secure, encrypted checkout. Card details go straight to the payment processor and are never stored by us.

    • Amazon
    • American Express
    • Apple Pay
    • Diners Club
    • Discover
    • Google Pay
    • Mastercard
    • PayPal
    • Shop Pay
    • Venmo
    • Visa
    Share to:

    This Speed Engineering LS ignition coil harness connects to four ignition coils and plugs into the factory harness. It is sold individually.

    ⚠️ Important Notes:

    • Works with standard GM coils "D51OC" (12570616) and "D514A" (12573190)
    • May also work with D581 (12558693), D585, D513A (12570616), MSD 8287, and 12619161 coils
    • Double check the connections to confirm fitment with the factory harness and ignition coils

    Features:

    • Connects to 4 Ignition Coils
    • Factory Harness Plug-In
    • Compatible Coils: GM "D51OC" (12570616) and "D514A" (12573190)
    • Sold Individually

    FAQ

    How many coils does this harness connect?

    The harness attaches to four ignition coils.

    Is this sold as a pair?

    No. The harness is sold individually.

    Which ignition coils does it work with?

    It works with standard GM coils "D51OC" (12570616) and "D514A" (12573190), and may also work with D581 (12558693), D585, D513A (12570616), MSD 8287, and 12619161 coils.

    Does it plug into the factory harness?

    Yes. It is a factory harness plug-in, but the connections should be checked to confirm fitment with the specific harness and coils being used.

    Is this part street legal?

    No. Speed Engineering sells this ignition coil harness as a race-only product intended for competition use only. Installation on a street-driven vehicle may violate the Clean Air Act (42 U.S.C. 7522(a)(3)).


    ⚠️ Race Use Only: This product is manufactured and sold for installation on vehicles used solely for competition. Once installed, the vehicle may not be used, registered, or licensed for use on a public road or highway. Installation on a street-driven vehicle may violate the Clean Air Act 203(a)(3), 42 U.S.C. 7522(a)(3).

    Shipping Policy
    • Free shipping on orders over $99 (excludes freight shipments).
    • In-stock orders typically ship within 1 to 2 business days. Weekend and holiday orders are processed the next business day.
    • Orders ship from Defiance, Ohio and a nationwide network of warehouses and manufacturers.
    • Items showing an ETA are not in stock yet. ETAs come from the manufacturer and can change.
    • No P.O. Boxes. International orders need a shipping quote, so email us first.

    Read the full Shipping Policy

    Return Policy
    • 30-day return window from the ship date. Returns must be approved first; email sales@berryperformancesales.com with your order number.
    • Items must be unused, complete and in the original packaging.
    • A 20% restocking fee applies, and return shipping is paid by the buyer.
    • Not returnable: installed or modified parts, opened or used programmers and tuners, custom orders, Open Box, and Clearance or Final Sale items.
    • Damaged, defective or incorrect items must be reported within 48 hours of delivery with photos.

    Read the full Return Policy

    Disclaimer

    All products are sold for off-road use only unless otherwise specified. Buyer assumes all responsibility for installation and operation. Seller is not liable for any incidental, indirect, or consequential damages — including engine failure, labor costs, or vehicle downtime — resulting from the use of any product sold.

    By making a purchase from Berry Performance Sales, you acknowledge and agree to abide by the terms and conditions of these Policies.

    For any questions or concerns, please contact us — we’re always happy to help.

    Recently Viewed