PR66754 - PROFORM LOCKING WEDGE HEADER BOLTS 8MM X 1.25 X .984" LS1/LS6 - 12 SET

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
• .984-inch Length
• Fits GM LS Engines with 1/4-inch Wide Flange
• Sold as One Set of 12 Pieces