Proform 66755 Exhaust Header Bolt
by PROFORM
Sale
$79.52
$51.25
Permanently Assembled With A Pair Of Special Washers Simple Wedge-Locking Method Uses Tension Instead Of Friction Contact With Oil Actually Facilitates The Wedge Effect Can Be Untightened With A Normal Wrench Lubricated And Reused Limited 30 Day Warranty
Specifications
Quantity - Set Of 12
Head Type - Hex Head
Length (IN) - 1.18 Inch
Thread Size - 8 Millimeter
Washer Type - Wedge Locking
Finish - Black Oxide
Color - Black
Material - Steel
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.
