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COMP Cams® Super Lock wider angle (10°) locks better distribute increasing valve spring loads over the retainer than typical 7° locks, reducing the chance of "pull-through" failure. These valve locks are precision-machined rather than stamped for accuracy from super-tough, fatigue resistant alloy material. Inside tang-to-taper relationship is held tightly for repeatable valve spring installed heights. Any Super Lock fits any COMP Cams® 10° retainer, just choose the correct lock for your valve size and application. Super Locks are recommended in all race applications. Set of 32 (16 pair).