COMP Cams ID Spring Seats Eb 1.550 X 57 - Set of 100

The COMP Cams 4781-100 Valve Spring Locators are thin, hardened steel alloy seats designed to protect the cylinder head and shims while accurately locating and holding valve springs in place. These locators are a crucial component for high-performance racing engines that experience extreme spring pressures and high RPMs, where older style standard shims may fail. This particular set comes as ID locators with the locating shoulder on the inside, which often allows for installation without the need for extensive machine work on the cylinder head. They provide a simple yet effective solution for proper valve spring setup.