COMP Cams Spring Seats For GM LS1 1.400

These COMP Cams spring seats are made from a hardened steel alloy, measuring 1.400 inches in outer diameter and .520 inches in inner diameter with a .060 inch thickness. They are designed to address the limitations of standard shims when dealing with the high spring pressures and RPMs found in modern performance engines. Unlike older designs that required significant cylinder head machining, these feature an inboard locating shoulder that centers the seat and securely holds the valve spring in place.

This design not only protects your cylinder head and any shim used but also ensures the spring remains properly positioned, which is crucial for consistent valve train operation at high speeds. They are a well-built solution for engines that see demanding use, offering a more robust way to manage spring location and pressure compared to basic shims.