Proform
Wedge Locking
Header Bolts
Chevrolet, Mopar, AMC.....
66752
Thread Size: 3/8 in.-16
Head Style: 6-point
Underhead Length (in.): 3/4 in.
Fastener Material: Steel
Fastener Color: Black oxide
Quantity: Sold as a set of 16
Proform self-locking wedge header bolts get a grip on your headers that won't let go—until you're ready!
These permanently assembled bolt sets feature special washers with super-hardened serrated teeth that,
when torqued to 28 lbs.-ft., bite into and grab the bottom of the bolt head and the top surface of the header.
Any bolt-loosening rotation is blocked by the wedge-locking action created by the washers' interfacing cams;
but what's really impressive is that engine vibration—the enemy—increases the tension, making them even more secure!
The bolts are re-useable and you can count on them to not fail.
Proform self-locking wedge header bolts put an end to the constant tightening for a leak-free, headache-free future.
