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

    Snow Performance Quick Disconnect Fittings, 1/4 in. Female Quick Connect to 3/8 in. NPT Male, Each

    Snow Performance Quick Disconnect Fittings, 1/4 in. Female Quick Connect to 3/8 in. NPT Male, Each

    $30.28

    Sonnax Shaft, Output 1.69/1.80 Extrem, Powerglide, 32T Short

    Sonnax Shaft, Output 1.69/1.80 Extrem, Powerglide, 32T Short

    $1,053.15

    DBA Front 5000 Series HD Brake Ring, 282mm, For Lotus Elise S1 NAS Nuts Included, Kit

    DBA Front 5000 Series HD Brake Ring, 282mm, For Lotus Elise S1 NAS Nuts Included, Kit

    $395.00

    MANLEY Connecting Rod, H-Beam, 6.2 in. Length, For Chrysler HEMI, w/ ARP2000 Set of 6

    MANLEY Connecting Rod, H-Beam, 6.2 in. Length, For Chrysler HEMI, w/ ARP2000 Set of 6

    $1,763.49

    MANLEY Piston Ring, 85mm Bore Size, 1.2 x 1.2 x 2.8mm Width, Each

    MANLEY Piston Ring, 85mm Bore Size, 1.2 x 1.2 x 2.8mm Width, Each

    $80.99