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Painless Performance Products Classic-Plus 28-Circuit Wire Harness for Universal Muscle Cars


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Classic-Plus 28-Circuit Wire Harness for Universal Muscle Cars
28-Circuit Classic-Plus Customizable Wiring Harness
  • Universal Muscle Car
  • Free Shipping - Estimated to ship direct from manufacturer on 05/01/24 , pending manufacturer availability. Learn More

    Thank you! We will notify you when this product becomes available.


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    20104 is rated 5.0 out of 5 by 3.
    Rated 5 out of 5 by from the best out there all i will use in my shop for my own and for customers
    Date published: 2019-10-30
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    I plan to get this harness for my 87 firebird when I do my blueprint 350 swap, but how do I use this harness to wire my ECU?

    Asked by: Emmytdaddy
    The Painless 764-20104 does not work with an ECU.
    Answered by: jshook
    Date published: 2022-10-17
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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.