7 Degree Super Valve Locks

The 7 Degree Super Valve Locks from MANLEY are precision-engineered components designed for serious engine builders and performance enthusiasts who demand maximum valve control and reliability under extreme conditions. These valve locks secure the valve spring retainer to the valve stem, preventing unintended valve float and loss of preload during high-RPM operation. Whether you're building a naturally aspirated stroker, a boosted LS platform, or a vintage muscle engine, proper valve lock geometry is critical to maintaining consistent valve timing and preventing catastrophic engine failure.

MANLEY's 7-degree design optimizes the contact angle between the lock and valve stem groove, reducing radial stress and extending component life while improving seating consistency. The super-duty construction ensures positive engagement without binding, critical for applications running aggressive valve spring rates and high valve lift profiles. Manufactured to exacting tolerances, these locks are compatible with MANLEY valve spring retainers and work seamlessly in both stock and heavily modified cylinder heads. The compact 2.7 x 1.75 x 3.1-inch profile and lightweight 0.3-pound construction make installation straightforward during top-end assembly.

Professional engine builders, drag racers, and weekend warriors restoring classic vehicles depend on MANLEY valve locks to ensure durability through thousands of combustion cycles. These locks are essential when upgrading to performance camshafts, higher spring pressures, or extended RPM limits. Proper installation requires careful attention to valve stem groove depth and lock positioning—verify compatibility with your specific retainer and spring combination before assembly. For serious engine builds where reliability cannot be compromised, the 7 Degree Super Valve Locks deliver the engineering precision and peace of mind needed for consistent performance.