Super 7 Bead Loc Valve Locks 5/16 -.050

The Super 7 Bead Loc Valve Locks 5/16 -.050 by Manley are precision-engineered components designed for high-performance engine builders and serious automotive enthusiasts. Valve locks—also called keepers—secure the valve spring retainer to the valve stem, preventing unwanted movement and wear during extreme operating conditions. This set of eight locks is essential for anyone building or rebuilding high-revving engines where reliability and durability under stress are non-negotiable.

These valve locks feature a 5/16-inch stem diameter and are manufactured from hardened steel with a black oxide finish for superior corrosion resistance and durability. The "Super 7 Degree" geometry refers to the locking angle that provides secure engagement with the valve stem while minimizing stress concentration. The -.050-inch reduced height specification allows for tighter valve spring clearance and package optimization in compact cylinder head designs, making them ideal for modern racing and performance engine applications where space and weight are critical.

Performance engine builders, race teams, and restoration specialists rely on Manley valve locks for consistent performance in naturally aspirated and boosted applications. The compact -.050-inch height reduction makes these locks particularly valuable in high-lift cam applications where retainer-to-spring coil clearance is limited. Each set contains eight locks, providing adequate inventory for a complete four-cylinder or two-cylinder four-valve engine build. Proper installation with valve spring compressor tools ensures correct seating and maximum longevity during competition or street performance use.