Vavle Lock 1pk 10-Degree 8mm Steel -.050

The Valve Lock 1pk 10-Degree 8mm Steel -.050 from PAC Racing Springs is a precision-engineered component designed for high-performance engine builders and serious enthusiasts who demand reliability in extreme valve train conditions. Valve locks are critical fasteners that secure valve keepers to the valve stem, preventing catastrophic valve drop during high-RPM operation. Whether you're building a race engine, turbocharged street machine, or naturally aspirated performance build, these locks ensure your valvetrain stays locked down under sustained boost, nitrous, or high-compression loads.

Constructed from hardened steel, this valve lock features a 10-degree included angle geometry optimized for compatibility with modern valve keeper designs and OEM-style retainers. The 8mm bore accommodates standard valve stem diameters, while the -.050 dimension specifies a tight tolerance that ensures positive engagement without excess clearance that could cause keeper rattle or valve stem wear. PAC Racing Springs manufactures these locks to exacting specifications, ensuring consistent geometry across the entire production run—critical when you're assembling multiple cylinder heads and need uniform valve spring pressures and geometry throughout the engine. The single-pack format makes this ideal for replacement locks, repairs, or selective component upgrades on existing builds.

Professional engine shops, race teams, and DIY builders regularly stock PAC valve locks for quick replacement during teardowns, dyno sessions, and valve spring upgrades. These locks are essential when changing valve springs, as old locks may be damaged during disassembly or worn beyond safe reuse. Installation is straightforward: position the lock halves into the keeper grooves, compress the spring with a valve spring compressor, and verify proper seating before releasing pressure. Compatible with any engine platform using 8mm valve stems and standard valve keeper geometry, this 1pk offering provides a spare set for mid-rebuild discoveries or backup stock for the serious enthusiast's workshop.