Proform Parts 66751 Exhaust Header Bolt

Description

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

• Permanently Assembled With A Pair Of Special Washers
• Simple Wedge Locking. Can Be Untightened With A Normal Wrench, Lubricated, And Reused
• No Little Clips Or Retainers To Handle
• Oil Actually Improves Performance
• Limited 1 Year Warranty