These Titanium Super Locks™ with lash cap recess feature a 10° lock angle and 11/32" valve stem size. They are recommended for all race applications because Titanium Super Locks™ have a wider angle (10°) that better distributes the ever increasing valve spring loads over the retainer than typical 7° locks. Precision-machined out of super-tough, fatigue-resistant metal alloy, Titanium Super Locks™ are the ultimate in accuracy and fit any COMP Cams® 10° retainer