These COMP Cams ID spring locators are hardened steel seats that center and secure valve springs with an inboard locating shoulder. The 4862 specification notes a 1.270" OD and a .520" ID. They’re intended to protect the head and shim under elevated spring pressures and high RPM, providing a robust alternative to older outside-retaining cup designs.
COMP Cams ID Spring Seats GM LS7 1.270in