COMP Cams 10 Super Locks w/o Lash Cap Recess - Hardened Steel - Single Groove - 11/32" Valve Stem 4240BU The 4770 features a 1

The 4770 features a 1

Extreme Environment

1975-1982 Chevrolet C10

1961-1968 Mercury Commuter

1970-1981 Mercury Marquis

COMP Cams 10 Super Locks w/o Lash Cap Recess - Hardened Steel - Single Groove - 11/32" Valve Stem 4240BU The 4770 features a 1These Steel Super Locks without a lash cap recess features a 10? lock angle and 11 32" valve stem size, and are recommended for all race applications. 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, Super Locks fit any COMP Cams 10? retainer. Precision machined rather than stamped for the