Spring Seat - Chromoly 1.350 x .575 .060 Thick

The Spring Seat - Chromoly 1.350 x .575 .060 Thick by PAC Racing Springs is a precision valve spring locator engineered for high-performance engine builds and racing applications. Designed for engine builders and performance enthusiasts who demand exact valve train geometry, this component ensures proper spring concentricity and controlled valve motion under extreme conditions. PAC Racing Springs manufactures these locators to exacting tolerances for competitors and OEM applications where reliability directly impacts performance.

Manufactured from chromoly steel, this spring seat locator features a 1.350-inch outer diameter and 0.575-inch inner diameter with 0.885-inch spring ID accommodation, all machined to 0.060-inch thickness for consistent load distribution. The inside-mount design positions the seat inside the spring coil, maintaining precise spring height and preventing lateral deflection during valve actuation. Chromoly construction provides superior fatigue resistance and durability compared to standard steel, critical for sustaining cyclic stress in racing engines running elevated RPM and boost levels.

This set of 16 locators suits builders working on small-block or big-block applications requiring multiple cylinder heads or complete engine packages. Installation requires proper valve spring compressor setup and precise alignment with the valve stem to achieve correct geometry. Compatibility depends on matching the 0.885-inch spring ID to your specific valve spring specification—verify your spring dimensions before ordering to ensure fitment and optimal valve train performance.