Super 7 Valve Locks - +.050in

The Super 7 Valve Locks - +.050in from MANLEY represent a critical upgrade for serious engine builders and high-performance mechanics targeting peak cylinder head reliability. Valve locks are the foundation of consistent valvetrain geometry—they secure the valve spring retainer to the valve stem, preventing rotational slippage that can lead to catastrophic valvetrain failure under extreme RPM or boost conditions. Built by MANLEY, a brand trusted across professional racing and street performance applications, these +.050-inch oversize locks address engines with worn or modified stem diameters, ensuring a precision fit where stock components fall short.

The +.050-inch dimension accommodates valve stems that have been resized or built to tighter tolerances, a common requirement in billet or competition valves and during custom head porting. MANLEY's Super 7 design delivers superior material quality and consistency, reducing the risk of galling, deformation, or spring relaxation during high-load cycles. Precision-machined geometry ensures positive groove engagement and minimal lateral play—critical when managing aggressive valve spring pressures or extended rev limits typical in turbo, supercharged, or naturally aspirated race builds. The compact form factor (2.7 x 1.75 x 3.1 inches) and lightweight profile (0.17 lbs per pair) make installation and balancing straightforward, without compromising strength or durability.

These valve locks are essential for any engine running custom or oversized valve stems, whether you're assembling a race engine, refreshing a high-mileage performance head, or building a forced-induction platform. Mechanics and builders working with billet cylinder heads, LS platforms, small-block Chevys, or any modular engine requiring tight tolerances will find the +.050-inch sizing indispensable. Installation pairs seamlessly with MANLEY retainers, keepers, and complete valvetrain systems, making them a go-to choice for shops prioritizing long-term reliability and consistent performance under demanding conditions. Always verify stem diameter specification with your valve supplier or head manufacturer to confirm proper fitment before assembly.