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AR900-5300
Spring OD N/A
Their specially engineered fulcrum and roller tip create far less friction than sliding factory models to lower oil temperatures
AF849-06-04BLK
AF578-04DS
10° Steel Super Valve Locks with Lash Cap Recess CO611-16 Product:11/32" Valve Stem Size AR900-530010 Steel Super Valve Locks with Lash Cap Recess11 32" Valve Stem Size CO611 16 611 16 Wider angle (10) locks better distribute the ever increasing valve spring loads over the retainer than typical 7 locks reducing the chance of "pull through" failure Precision machined rather than stamped for the ultimate in accuracy Super tough, fatigue resistant alloy material Inside tang to taper relationship held tightly for repeatable valve spring installed
