5/16 Valve Locks - Mini 8

PAC Racing Springs 5/16 Valve Locks - Mini 8 are precision-engineered components designed for high-performance engine builds and race applications. This set of 16 locks features an 8-degree geometry optimized for 5/16-inch valve stems, delivering the additional 0.050-inch height necessary for proper valve control in demanding conditions. Manufactured from steel with black oxide coating, these valve locks provide corrosion resistance and consistent performance across extended engine operation.

The 8-degree angle specification is critical for maintaining proper valve seat contact and preventing valve float during high-RPM operation. The additional 0.050-inch height gain allows builders to fine-tune valve train geometry when working with custom heads, upgraded valves, or modified pushrod lengths. Black oxide finish resists rust and oxidation without adding significant friction, making it suitable for both naturally aspirated and forced-induction applications. Each lock in the set is produced to consistent tolerances, ensuring uniform performance across all sixteen pieces.

These locks are essential for engine builders, performance enthusiasts, and race teams working with small-block V8s, LS engines, or other platforms requiring 5/16-inch stem components. The Mini 8 design fits applications where standard larger locks would cause clearance issues or exceed weight specifications. Whether assembling a street performance engine or preparing for track duty, this set provides the valve control precision necessary for reliable power delivery and long component life.

PAC Racing Springs is recognized in the performance engine community for producing high-tolerance valve train components that meet OEM and racing specifications. This product represents the brand's commitment to precision manufacturing, making it a trusted choice for builders prioritizing repeatability and consistency in critical engine assemblies.