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Proform Wedge-Locking Header Bolts for Small Block Chevy, Big Block Mopar, AMC, Buick, Oldsmobile, & Pontiac in 3/8" x 1" Long

778-66753


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Wedge-Locking Header Bolts for Small Block Chevy, Big Block Mopar, AMC, Buick, Oldsmobile, & Pontiac in 3/8" x 1" Long
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$31.95
More than 10 available
Wedge-Locking Header Bolts
  • Small Block Chevy, Big Block Mopar, AMC, Buick, Oldsmobile, & Pontiac
  • 3/8" Diameter x 1" Long
  • Black Oxide
  • 12/pkg
  • Ships
    QTY
    66753 is rated 4.6 out of 5 by 9.
    Rated 5 out of 5 by from Great Product! They really lock in! These are the greatest thing since sliced bread. They really lock in, but can be loosened easily.
    Date published: 2022-06-29
    Rated 5 out of 5 by from Still good after the years. Just like my title says. I installed them the years ago, along with dead soft aluminum gaskets. Perfect combo! Not a leak and not a single issue.
    Date published: 2022-06-12
    Rated 5 out of 5 by from Worked well Product worked well, delivered on time. What more could I ask?
    Date published: 2020-04-26
    Rated 5 out of 5 by from Awesome Locking Header Bolts I am amazed on how well these bolts and wedges hold. I have rechecked them after a 100 miles and they are the same tightness as when I installed them.
    Date published: 2016-10-03
    Rated 5 out of 5 by from Great invention !! 2nd time I've used these bolts. I won't use anything else from here on out. Over the years I've had issues with header bolts loosening..what a pain. NOT WITH THESE BOLTS ! Try 'em and you'll like 'em. Kinda pricey........til you use 'em.
    Date published: 2015-02-14
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    Do these fit stock headers?

    Asked by: Carter56
    The Spectre 778-66753 bolt does not fit stock exhaust.
    Answered by: jshook
    Date published: 2023-03-09
    • y_2024, m_4, d_15, h_3CST
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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.

    Tools:

    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.