Proform Parts 66752 Exhaust Header Bolt
by PROFORM
Sale
$90.13
$58.08
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
Specifications
Quantity - Set Of 16
Bolt Type - Universal
Head Type - Hex Head
Length (IN) - 3/4 Inch
Thread Size - 3/8 Inch-20
Washer Type - Wedge Locking
Finish - Black Oxide
Color - Black
Material - Steel
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. 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.
