1.350 Pacaloy Valve Spring Retainers - 10 Dg

The 1.350 Pacaloy Valve Spring Retainers – 10 Degree by PAC Racing Springs are precision-engineered components designed for serious engine builders and performance enthusiasts who demand reliable valve train control at high RPM. These retainers sit at the critical interface between your valve spring and the valve stem, preventing unwanted spring surge and maintaining consistent preload under extreme operating conditions.

Constructed from Pacaloy – PAC Racing Springs' proprietary alloy – these retainers deliver superior strength-to-weight ratio compared to standard steel alternatives, reducing rotating mass in the valve train and allowing higher spring rates without excessive inertial loads. The 1.350-inch OD specification fits standard valve spring diameters common to small-block and big-block applications, while the 10-degree angular contact surface ensures proper seat geometry and predictable load transfer from spring to retainer to valve stem.

These retainers are ideal for engine builders targeting 6,500+ RPM applications, particularly in street-strip hybrids, bracket racing, and full competition builds where durability and performance are paramount. Proper valve spring retainer selection is non-negotiable for achieving optimal engine performance and longevity.