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

    Crow Cams 11/32 RETAINER ECOTEC CONICAL

    Crow Cams 11/32 RETAINER ECOTEC CONICAL

    $204.59

    DBA Rear Street Series Brake Pads, For Holden Commodore VF / 2013-17, Kit

    DBA Rear Street Series Brake Pads, For Holden Commodore VF / 2013-17, Kit

    $57.30

    Haltech Merchandise, Classic T-Shirt Black with Blue Logo Size: 3XL

    Haltech Merchandise, Classic T-Shirt Black with Blue Logo Size: 3XL

    $35.00

    Nitrous Express Adapter Fitting, Y-Block, Pure-Flo, Aluminum, Black Anodized, -4 in. NPT Male Inlet, -4 AN Male Outlets, Each

    Nitrous Express Adapter Fitting, Y-Block, Pure-Flo, Aluminum, Black Anodized, -4 in. NPT Male Inlet, -4 AN Male Outlets, Each

    $61.44

    ARP T-Shirt, Short Sleeve, Cotton, Ash Color, ARP Logo (Front and Rear), Men's Medium, Each

    ARP T-Shirt, Short Sleeve, Cotton, Ash Color, ARP Logo (Front and Rear), Men's Medium, Each

    $45.21

    DBA Rear Street Series En-Shield Brake Rotor, 284mm, For Kia Niro HEV&PHEV DE 1.6L 21, Kit

    DBA Rear Street Series En-Shield Brake Rotor, 284mm, For Kia Niro HEV&PHEV DE 1.6L 21, Kit

    $126.20