Steel C/M Spring Seats - 1.500 x .715 x .630

PAC Racing Springs Steel Chromoly Spring Seats in 1.500 x .715 x .630 dimensions are precision valve spring retainers engineered for high-performance engine applications. These inside retainers feature a 0.030-inch thickness, 1.500-inch outer diameter, and 0.630-inch inner diameter with a 0.715-inch spring ID, delivering the tight tolerances required for consistent valve control at elevated RPM. Supplied as a set of 16, these chromoly steel seats provide the durability and reliability demanded by racing engines and high-output performance builds.

The chromoly construction resists the thermal cycling and mechanical stress inherent in racing environments where standard steel retainers can fatigue or deform. PAC Racing Springs' manufacturing standards ensure that each retainer maintains dimensional consistency across the set, critical for uniform valve seating and eliminating compression variability that can lead to performance loss or valve train noise. The specified 0.030-inch thickness strikes the balance between material strength and spring seat compliance, allowing proper load transfer while maintaining structural integrity under sustained high-RPM operation.

These spring seats are designed for engine builders and performance enthusiasts constructing cam packages where off-the-shelf retainers do not meet the application's specifications. The inside retainer configuration fits within the coils of the spring itself, providing a compact solution for builds where space constraints or specific spring geometries require this design. Whether assembling a naturally aspirated performance engine, turbo application, or endurance racing package, the precision fit and material reliability of these PAC retainers ensure valve train stability and longevity.