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Your cart is empty.COMP Cams Magnum Polylocks are best for moderate lift and spring pressure applications. Designed for ultimate strength and locking force. Hi-Tech Polylocks work well in all high end race applications. The stud girdle polylocks are precision ground for minimum run out and tapered for extra strength in the locking area.
Exiled
Reviewed in the United States on March 19, 2024
Only Needed 2 of these, but work perfectly.Heavy duty polylocks.
James p Weaver
Reviewed in the United States on February 16, 2022
Lock nuts for 1964 389 with 7/16 screw in studs ( pontiac used 421 SD heads in 1964)Any performance cam needs an adjustable valve train, these lock nuts are way better the the stock poly lock nuts
tim baker
Reviewed in the United States on November 25, 2021
Two big outside diameter to fit in most aluminum roller rockers
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