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    • MSD Red Super Conductor Spark Plug Wire Set, Big Block Chevy Marine, HEI | 31489
    • MSD Red Super Conductor Spark Plug Wire Set, Big Block Chevy Marine, HEI | 31489
    • MSD Red Super Conductor Spark Plug Wire Set, Big Block Chevy Marine, HEI | 31489
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    • Super Conductor Spark Plug Wire Set Big Block Chevy Marine, Hei For Use On Chevy Big Block Marine Engines, Hei, Red Jacket MSD Ignition
    • Super Conductor Spark Plug Wire Set Big Block Chevy Marine, Hei For Use On Chevy Big Block Marine Engines, Hei, Red Jacket MSD Ignition
    • Super Conductor Spark Plug Wire Set Big Block Chevy Marine, Hei For Use On Chevy Big Block Marine Engines, Hei, Red Jacket MSD Ignition
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    Sale!

    MSD Red Super Conductor Spark Plug Wire Set, Big Block Chevy Marine, HEI | 31489

    Vendor: MSD
    Part Number: 31489
    Save $26
    Sale Price $207.95 Regular Price $233.95

    Available to order. In-stock orders typically ship in 1 to 2 business days.

    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.
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    Reliability matters as much as performance in marine applications, and this MSD 8.5mm Super Conductor wire set is built for the task. A tough, high-heat sleeve provides excellent abrasion protection, while MSD's Dual Crimp terminals lock securely to the spark plug terminal for a reliable connection in a marine environment.

    Specifications:

    • Brand: MSD
    • Product Type: Spark Plug Wire Set
    • Application: Big Block Chevy Marine
    • Wire Diameter: 8.5mm (Super Conductor)
    • Insulation Color: Red
    • Boot Style: HEI
    • Warranty: Manufacturer's Limited 1-Year Warranty
    • Warning: California Proposition 65
    • Part Number: 31489

    Built specifically for Big Block Chevy marine engines using an HEI-style cap.

    FAQ

    What engines is this wire set designed for?

    This set is built for Big Block Chevy marine engines, using an HEI-style boot.

    Why use this wire set in a marine application?

    MSD designed this set with a tough, high-heat sleeve for excellent abrasion protection, since reliability is as important as performance in a marine engine bay.

    What type of terminals does this wire set use?

    Dual Crimp terminals provide the strongest connections to the wire and lock securely to the spark plug terminal.

    Is this wire set the 8.5mm Super Conductor line?

    Yes, it uses MSD's 8.5mm Super Conductor construction for low resistance and EMI suppression.

    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.

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