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

    DBA Front Street Series En-Shield Brake Rotor, 319.6mm, For Infiniti FX37/50 G37 M30D/35H/37 Q60/70/X70 12, Kit

    DBA Front Street Series En-Shield Brake Rotor, 319.6mm, For Infiniti FX37/50 G37 M30D/35H/37 Q60/70/X70 12, Kit

    $172.00

    ICON Piston, 4 in. Bore, 1/16, 1/16, 3/16 in. Ring Grooves, For Chevrolet 350 Rod 5.700 Hollow Dome -13cc 2V, .040 Oversized, w/ Rings, Each

    ICON Piston, 4 in. Bore, 1/16, 1/16, 3/16 in. Ring Grooves, For Chevrolet 350 Rod 5.700 Hollow Dome -13cc 2V, .040 Oversized, w/ Rings, Each

    $1,748.12

    Whiteline Control Arm Upper, Inner Rear Bushing, Rear, Mitsubishi, 2007-2016, Kit

    Whiteline Control Arm Upper, Inner Rear Bushing, Rear, Mitsubishi, 2007-2016, Kit

    $196.30

    COMP Cams Lifter, Endure-X, Solid Mechanical Roller, Vertical Link Bar, .842 in. Dia, For Holden V8, Set of 16

    COMP Cams Lifter, Endure-X, Solid Mechanical Roller, Vertical Link Bar, .842 in. Dia, For Holden V8, Set of 16

    $1,525.91

    MANLEY Piston, Turbo Tuff, 1.130 in. Compression Distance, 85.5 mm Bore Size, -2.5 Flat top, For Mitsubishi, Each

    MANLEY Piston, Turbo Tuff, 1.130 in. Compression Distance, 85.5 mm Bore Size, -2.5 Flat top, For Mitsubishi, Each

    $507.82