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Details
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.
More Information
| SKU | BCHW66755 |
|---|---|
| UPC | 037995667550 |
| ASIN | B00U1QL6T2 |
| Brand | Proform |
| Part Type | Exhaust Header Bolt |
| MPN | 66755 |
| Weight | 0.540000 |
| Length | 3.800 |
| Height | 1.750 |
| Width | 4.500 |
Fitment Compatibility
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