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

    MANLEY Piston, 1.550 in. Compression Distance, 4.060 in. Bore Size, Flat Top, Left, For Chevrolet SB, Each

    MANLEY Piston, 1.550 in. Compression Distance, 4.060 in. Bore Size, Flat Top, Left, For Chevrolet SB, Each

    $197.40

    MANLEY Valve, Race Master, Exhaust, 1.6 in. Head Dia, 0.3136 in. Stem Dia, 5.05 in. Length, For Chevrolet SB, Each

    MANLEY Valve, Race Master, Exhaust, 1.6 in. Head Dia, 0.3136 in. Stem Dia, 5.05 in. Length, For Chevrolet SB, Each

    $51.07

    QA1 Grommet Style Ball Joint, Stainless, 1/2in.8-28

    QA1 Grommet Style Ball Joint, Stainless, 1/2in.8-28

    $11.79

    QA1 K Series 3 Piece Carbon Rod End, 7/16in. Bore, 7/16in.-20 LH Female Thread, PTFE Lined

    QA1 K Series 3 Piece Carbon Rod End, 7/16in. Bore, 7/16in.-20 LH Female Thread, PTFE Lined

    $24.92