PROFORM Wedge-Locking Header Bolts ELIMINATE the need to constantly re-tighten collector bolts, and without the need for clips, pins, racing-wire, chemicals or gunk. The secret is in the Wedge-Locking Washer's super-hardened external teeth that "bite" into the bottom of the bolt head and the top flange surface. Vibrations that normally cause other bolts to loosen, are blocked by the wedge-locking action that uses tension, instead of friction to stay snug. In fact, contact with oil actually facilitates the effect. Installs/uninstalls with a normal wrench, lubricate, and then reuse. Each set comes with twelve Hex Head, Grade 8 (12.9) steel bolts (3/8"-16 thread, 1" long) with a black oxide finish, and pre-assembled Wedge-Locking Washers.

Features:
Grade 8 (12.9) Steel
  • Hex Head Type
  • 1-inch Length
  • Fits GM V6, SB 265-400, Buick, Olds, Pontiac '79 and earlier, Mopar BB 383-440 exc 413, AMC V8's w 3/8" bolts
  • PROFORM Parts Brand Product
  • Sold as Set of 12
  • More From This Category

    ARP Wheel Studs, NASCAR Speed, Quick-Nose, Press-in, 5/8-18 in. RH, 3.500 in. UHL, Set of 5

    ARP Wheel Studs, NASCAR Speed, Quick-Nose, Press-in, 5/8-18 in. RH, 3.500 in. UHL, Set of 5

    $265.78

    Nitrous Express Proton Fly By Wire, 35-50-75-100-125, 150 Hp, Universal, TPS Activation, 12Lb Bottle, Kit

    Nitrous Express Proton Fly By Wire, 35-50-75-100-125, 150 Hp, Universal, TPS Activation, 12Lb Bottle, Kit

    $2,907.05

    Snow Performance Diesel Stage 3 Boost Cooler? Water-Methanol Injection Kit Dodge 5.9L Cummins (SS Braided Line, 4AN Fittings)

    Snow Performance Diesel Stage 3 Boost Cooler? Water-Methanol Injection Kit Dodge 5.9L Cummins (SS Braided Line, 4AN Fittings)

    $2,211.15

    Sonnax Shift Lever Kit, Powerglide, Each

    Sonnax Shift Lever Kit, Powerglide, Each

    $33.66

    DBA Front Street Series Brake Pads, For Renault Megane/CC 2008-On, Kit

    DBA Front Street Series Brake Pads, For Renault Megane/CC 2008-On, Kit

    $80.40