7 Degree Valve Locks

The MANLEY 7 Degree Valve Locks (MAN13083-16) are precision-engineered valve locks designed for high-performance engine applications where reliability under extreme conditions is non-negotiable. This set of 16 steel valve locks features a 7-degree geometry optimized to secure 0.341-inch valve stems at standard height, preventing valve float and loss during aggressive engine operation.

The 7-degree angle geometry of these locks works in conjunction with valve retainers to maintain consistent valve spring pressure across the full engine RPM range. Black oxide coating provides corrosion resistance and durability in high-temperature environments typical of race engines, street performance builds, and forced-induction applications. Steel construction ensures the tensile strength necessary to prevent lock failure under the cyclic loading imposed by aggressive cam profiles and elevated spring pressures.

MANLEY valve locks are specified by engine builders and performance shops for applications requiring OEM-quality components that exceed stock durability standards. The 0.341-inch stem diameter and standard height configuration ensure compatibility with common aftermarket and OEM valve trains. This 16-piece set provides complete lock coverage for a full 16-valve engine, eliminating the need to source locks individually.

Valve locks are critical components in any high-RPM or high-boost engine assembly. Proper lock selection and installation prevent valve float—the condition where valves separate from their seats due to insufficient retaining force—which would result in catastrophic engine damage. MANLEY's precision manufacturing and strict quality control make these locks a preferred choice for professional engine builders and serious enthusiasts.