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.

Attributes:

• Brand Name: Proform
• GTIN: 00037995667536
• Applications: Fits GM V6, SB 265-400, Buick, Olds, Pontiac 79 and earlier, Mopar BB 383-440 exc 413, AMC V8's w 3/8in bolts
• Color: Black Oxide
• Diameter: 3/8-in.
• Feature/Benefit: Wedge-Locking Technology Eliminates Constantly Re-Tightening Exhaust Collector Bolts; Blocks Bolt-Loosening Rotation caused by Vehicle Vibrations.
• Finish: Black Oxide
• Length: 1 inch
• Material: Steel
• Part Type: Header Bolts

Extended Information:

• Country of Origin: Taiwan
• Emissions : CARB Eligible
• Life Cycle Status: Available To Order

Packing Information:

• Quantity of Each: 1
• Package UOM: ST
• Dimension: 6.75 x 4.5 x 1.75 inches
• Weight: 0.65 POUNDS