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66751 - Wedge-Locking Header Bolts - 3/4" L x 3/8-16, 12 Bolts

This product may require vehicle validation(s) for proper fitment. Please contact us to confirm correct vehicle fitment and usage.

66751
Pricing: $26.05

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Description

Fits: GM V6, SB 265-400, Buick, Olds, Pontiac '79 & earlier
Mopar BB 383-440 exc 413, AMC V8's w 3/8" bolts


Each PROFORM® Grade 8 Header Bolt is permanently assembled with a pair of special washers. When the bolt is torqued to 28+ ft-lbs, the washers’ super-hardened external teeth bite into and grip the bottom of the bolt head and the top surface of the header. After being self-locked in this manner, any bolt-loosening rotation is blocked by a wedge-locking action created by the washers’ interfacing, matching cams. It’s an uphill climb: vibration that might ordinarily loosen the bolt actually increases the wedge-locking tension, securing the bolt even more. Because this simple wedge-locking method uses tension instead of friction, contact with oil actually facilitates the wedge effect. When changing headers, PROFORM Header Bolts can be untightened with a normal wrench, lubricated, and reused.


16 Bolt Kit 3/8" X 3/4" Long


12 Bolt Kit 3/8" X 1" Long




Application List

Universal

Details

  • 66751
  • 66751
  • Proform
  • New

Shipping Information

  • Item Requires Shipping
  • 0.8 lbs.
  • W5.0000” x H2.0000” x L7.0000”

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