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MSD Ignition 8420MSD

MSD Ignition Cap-A-Dapt Kit Adjustable Rotor


Ships directly from the manufacturer
Save $10 off $199, $45 off $499, $100 off $999. Promo Code: FALLFUN exclusions apply

MSD Ignition Cap-A-Dapt Kit Adjustable Rotor $72.64
Out of stock
Cap-A-Dapt Kit
  • Adjustable Rotor
  • For Chevy V8
  • MSD Ignition 8420MSD Details


    MSD Cap-A-Dapt adapts a large Ford-style cap onto most MSD Billet and Pro-Billet Distributors & spaces the spark plug terminals farther apart which lessens the chance of crossfire and ionization occurring. Spark plug-type terminals provide tight connections that will not vibrate loose. Rotors are injection molded out of Rynite for incredible strength and resistance to spark. Incorporated thick vanes stir air even more for additional ionization prevention. The adjustable two piece rotor allows you to adjust the rotor to to the cap terminal alignment so you can adjust the rotor phasing. If you are running a Multi-Step Retard or Timing Controller the ability to adjust the rotor phasing is beneficial. Cap-A-Dapts also include a cap spacer.

    Kit Includes:

    • High-Quality Cap with Brass Terminals
    • Rotor
    • Cap Spacer


    Manufacturer's Part Number:
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    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.

    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.