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

    Autometer Direct Fit Dash Kit, (3 3/8" X2, 2 1/16" X4), Chevrolet Nova 66-67, Designer Black, Design

    Autometer Direct Fit Dash Kit, (3 3/8" X2, 2 1/16" X4), Chevrolet Nova 66-67, Designer Black, Design

    $1,989.60 $2,094.32

    5% OFF
    COMP Cams Camshaft, Magnum, Hydraulic Flat Cam, Advertised Duration 268/276, Lift 0.464/0.464, For Chrysler 273-360, Each

    COMP Cams Camshaft, Magnum, Hydraulic Flat Cam, Advertised Duration 268/276, Lift 0.464/0.464, For Chrysler 273-360, Each

    $602.88

    COMP Cams Guideplate, Black Oxide, Steel, Raised, 2 Piece, Adjustable, BBC, 3/8 in. Pushrod 7/16 in. Stud, Set of 8

    COMP Cams Guideplate, Black Oxide, Steel, Raised, 2 Piece, Adjustable, BBC, 3/8 in. Pushrod 7/16 in. Stud, Set of 8

    $127.25

    DBA Street Series Brake Shoes, For Al-Ko Trailer 304.8mm, Kit

    DBA Street Series Brake Shoes, For Al-Ko Trailer 304.8mm, Kit

    $135.10

    MANLEY Valve, Race Master, Exhaust, 1.6 in. Head Dia, 0.311 in. Stem Dia, 5.87 in. Length, For Dodge, Set of 10

    MANLEY Valve, Race Master, Exhaust, 1.6 in. Head Dia, 0.311 in. Stem Dia, 5.87 in. Length, For Dodge, Set of 10

    $500.47