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

    Cast Piston

    Cast Piston

    $92.83

    FAST O-Ring for -3SAE Fitting

    FAST O-Ring for -3SAE Fitting

    $9.15

    Rancho Suspension Shock Absorber

    Rancho Suspension Shock Absorber

    $118.69

    COMP Cams Cam and Lifters, High Energy, Hydraulic Flat, Advertised Duration 252/252, Lift .460/.460, For Chevrolet Big Block 396-454, Kit

    COMP Cams Cam and Lifters, High Energy, Hydraulic Flat, Advertised Duration 252/252, Lift .460/.460, For Chevrolet Big Block 396-454, Kit

    $695.57

    MANLEY Connecting Rod, H-Beam, 5.927 in. Length, For Mazda, Each

    MANLEY Connecting Rod, H-Beam, 5.927 in. Length, For Mazda, Each

    $255.67

    TURBOSMART Gen 4 WG50 Top Cap replacement - Blue

    TURBOSMART Gen 4 WG50 Top Cap replacement - Blue

    $89.17