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

    Sonnax Oversized Secondary Pressure Regulator Valve Kit, JF011E (Re0F10A), Each

    Sonnax Oversized Secondary Pressure Regulator Valve Kit, JF011E (Re0F10A), Each

    $76.88

    Whiteline Front Control Arm, Upper Bushing, 43.2mm OD, 24mm ID, Mercedes-Benz, For Nissan, Kit

    Whiteline Front Control Arm, Upper Bushing, 43.2mm OD, 24mm ID, Mercedes-Benz, For Nissan, Kit

    $161.12

    Wilwood Caliper, EPB1, Lug, 1.10 in. Rotor Width, 14.00 in. Rotor Dia, 1.25 in. Bore, RH, Alum, Black, Each

    Wilwood Caliper, EPB1, Lug, 1.10 in. Rotor Width, 14.00 in. Rotor Dia, 1.25 in. Bore, RH, Alum, Black, Each

    $576.92

    COMP Cams Steel Retainer, Tool, 7 Degree, 8mm Valve, Spring w/ 1.290 in. O.D, Each

    COMP Cams Steel Retainer, Tool, 7 Degree, 8mm Valve, Spring w/ 1.290 in. O.D, Each

    $34.67