Distributor Cap and Rotor Kit for 1975-1990 GM HEI Distributors [Red]
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MSD IGNITIONPART NUMBER: 121-8416

Distributor Cap and Rotor Kit for 1975-1990 GM HEI Distributors [Red]

$5195
More than 10 available
ShippingShips on Nov 02, 2026
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Cap and Rotor Kits
Replacement Distributor Cap and Rotor Set
  • Fits 1975-1990 GM HEI Distributors
  • Screw-On Rotor Attachment
  • Red Cap
  • Sold as a Matched Cap and Rotor Kit

    A cap and rotor are maintenance items, not permanent parts. Carbon tracking inside the cap and a worn rotor tip both bleed off spark energy long before the engine actually misfires, which is why they should be replaced together as a set. This kit covers GM HEI distributors and includes both pieces so nothing is left mismatched.

    MSD 8416 Distributor Cap and Rotor Kit Features:

    • Fits 1975-1990 GM HEI distributor applications.
    • Screw-on rotor attachment type.
    • Red cap with matching rotor.
    • Supplied as a complete cap and rotor kit.
    • MSD distributor caps and rotors are designed with performance in mind and molded from high-quality, voltage-insulating material with terminals that resist carbon tracking. Whenever the distributor cap is changed, you should install a new rotor. Likewise, if you're replacing the rotor, be sure to install a new cap as well. MSD has new kits featuring Rynite injection molded distributor caps and retainers to complete your distributor tune-up. MSD also has Cap-A-Dapts to fit large Ford-style caps onto MSD distributors.
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      Keep your ignition system running at peak performance with MSD Distributor Caps and Rotors, engineered for long-lasting reliability and superior spark delivery. Whether you're performing routine maintenance or upgrading your ignition components, these high-quality parts are designed to meet the demands of street and strip applications alike.

      Each MSD distributor cap and rotor is built with performance in mind, using high-dielectric strength materials that resist carbon tracking and ensure accurate spark distribution. The brass terminals provide better conductivity and longer life compared to standard aluminum terminals, helping to deliver consistent ignition timing and improved throttle response.

      Designed to be a direct-fit replacement for MSD distributors, the MSD distributor cap ensures a secure connection and excellent durability under high-heat, high-vibration engine bay conditions. Whether you're tackling tough driving conditions or logging laps at the track, you can count on these components to perform when it matters most.

      The MSD rotor is equally robust, constructed from top-grade materials to handle the high voltage output of performance ignition systems. It delivers precise spark transfer to the cap terminals, supporting high-RPM operation and clean combustion with every cycle.

      For street cars, muscle cars, and race vehicles alike, MSD Distributor Caps and Rotors are the smart choice for drivers who demand dependability, performance, and easy installation. Upgrade with MSD to maintain your ignition system’s edge and keep your engine firing on all cylinders.

    Part TypeDistributor Cap and Rotor Kit
    Product LineMSD Distributor Caps and Rotors
    BrandMSD IGNITION
    Package Height4.1
    Package Width7.0
    Package Length8.7
    Weight1.1 PG
    Part CategoryPerformance Parts
    Rotor Attachment TypeScrew-On
    Rotor IncludedYes
    Plug Wire RetainerNo
    Distributor Cap ColorRed
    ColorRed
    QuantitySold as a kit
    Distributor TypeAccessories
    Cap Attachment StyleClamp down
    Cap Mounted CoilYes
    Distributor Cap MaterialRynite
    Cap StyleMale/HEI
    Part FitmentSemi Universal
    Coil Dust Cover IncludedNo
    Contact Terminal MaterialStainless steel
    Vendor Part Number8416
    Package Qty1
    Package TypeEA
    No Questions
    No Reviews

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