PROFORM 66756 APPLICATION SPECS:

Exhaust Header Bolt; Universal; 3/8 - 16 Inch Thread Size; 1 Inch Length; Locking Bolt; Hex Head; Black Oxide; Steel; With Wedge Locking Washers; Set Of 16

Each PROFORM® Grade 8 Header Bolt is permanently assembled with a pair of special washers. When the bolt is torqued to 28+ Foot-Pounds, 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.

• Bolt Type: Universal
• Head Type: Hex Head
• Head Size: 3/8 Inch
• Thread Size: 3/8 Inch-16
• Length (IN): 1 Inch
• Finish: Black Oxide
• Color: Black
• Material: Steel
• Washer Type: Wedge Locking

FAQ

What part number is this? The listed part number is 66756.

Is this product designed for direct replacement? Confirm the original part specifications and intended application before ordering.

Should I confirm compatibility before ordering? Yes. Compare the original part and specifications before ordering.

Common Searches

• Proform 66756
• 66756 specifications
• Proform Exhaust Header Bolt; Universal; Proform 66756 Header Bolts; Hex Head; 3/8-16 X 1inL