ProForm 66752 Wedge-Locking Header Bolts Hex Head 3/8 Diameter X 3/4 Inch Blk Oxide 16 Pcs

MSRP: $41.31
(You save $5.36 )
(No reviews yet) Write a Review
0.65 LBS
Calculated at Checkout

Applies To Continental U.S. orders only

Adding to cart… The item has been added

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. Its 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. Sold as a set.

Product Details:

  • Engine Header Bolts
  • Wedge-Locking Technology
  • Hex Head Type
  • 3/8-16 Inch x 3/4 Inch Long
  • Black Oxide Finish
  • 16 Pcs in kit
  • Fits Big Block Chevy|Ford 5.0L|Small Block Ford|Chrysler 413 Engines
  • Sold As A Set