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

    COMP Cams Cam / Lifters / Valvetrain XE Computer Controlled Hydraulic Flat Advertised Duration

    COMP Cams Cam / Lifters / Valvetrain XE Computer Controlled Hydraulic Flat Advertised Duration

    $1,158.81

    Motive Gear S547 3-4, 5-R Slider, Each

    Motive Gear S547 3-4, 5-R Slider, Each

    $95.53

    QA1 Stocker Star Shock, Single Adjustable, 13-1/4in. to 20-1/2in., Stud/Bushing

    QA1 Stocker Star Shock, Single Adjustable, 13-1/4in. to 20-1/2in., Stud/Bushing

    $413.39

    Trick Flow Cylinder Head, Twisted Wedge 11R 190, CNC Competition Ported, Assembled, 66cc CNC Chambers, Small For Ford, Each

    Trick Flow Cylinder Head, Twisted Wedge 11R 190, CNC Competition Ported, Assembled, 66cc CNC Chambers, Small For Ford, Each

    $3,407.50

    Wilwood Bolt, Socket Head, Alloy Steel, Grade 8, Hex Drive, 1.000 in. Length, 5/16-18 Thread, Kit

    Wilwood Bolt, Socket Head, Alloy Steel, Grade 8, Hex Drive, 1.000 in. Length, 5/16-18 Thread, Kit

    $115.52