Proform PR66755 Self-Locking Wedge Header Bolts Hex Head Steel Nickel Plated 8mm x 1.25 Chev 5.7 6.0L LS1 LS6 Set Of 12

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Proform Parts

PR66755
$78.65 AUD
$78.65 AUD
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Proform PR66755 Self-Locking Wedge Header Bolts Hex Head Steel Nickel Plated 8mm x 1.25 Chev 5.7 6.0L LS1 LS6 Set Of 12

Item Description

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.

Features:

  • Grade 8 (12.9) Steel
  • Hex Head Type
  • 1.181-inch Length
  • Fits GM LS Engines with 1/4-inch Wide Flange
  • Sold as One Set of 12 Pieces


Manufacturer Information

  • Manufacturer: Proform Parts
  • Manufacturer Part Number:
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