Wedge-Locking Collector Bolts and Nuts; 3/8 dia. X 1.25in; Black Finish; 6 Pcs | #66757

Collector Bolts

Grade 8, Black Oxide Finish; 3/8"-16 Thread Diameter; 1" Long
Set of 6 Nut & Bolt Combos and 12 Wedge-Locking Washers
  • Wedge-Locking Washers Secure with Tension, Not Friction
  • Eliminates Need to Constantly Re-Tighten Exhaust Collector Bolts
  • For Six-Bolt, 3/8"-16; 1" Length Applications
  • No Clips, Pins, Racing-Wire, Retainers or Gunk to Deal with (& Lose!)
  • Hex Head Type, Grade 8 (12.9) Steel Bolts; Black Oxide Finish
  • Use with Regular Wrench; Take-Off & Reuse
  • PROFORM Parts Brand Product
PART# 66757
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PROFORM Wedge-Locking Exhaust Collector 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 six Grade 8 bolts (3/8"-16 thread, 1" long) with a black oxide finish, six nuts and six pairs of Wedge-Locking Washers.

  • Wedge-Locking Technology Eliminates Constantly Re-Tightening Exhaust Collector Bolts; Blocks Bolt-Loosening Rotation caused by Vehicle Vibrations.
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