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#58666824
$34.95
/set
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1" Under Head Length, 3/8"-16 Thread Pitch
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Return PolicyEach PROFORM Grade 8 Header Bolt is permanently assembled with a pair of special washers. When the bolt is torqued to 28+ ft-lbs, 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.
WARNING:
Cancer and Reproductive Harm – www.P65Warnings.ca.gov
| KEY SPECS | |
|---|---|
| MFG. Part # | 66824 |
| Brand | Proform |
| GENERAL | |
| Under Head Length | 1" |
| Thread Pitch | 3/8"-16 |
1 Question • 1 Answer
Will these work on GM
by Charlie
• 4 months ago
1 answer
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