The COMP Cams inboard ID spring seat centers and secures valve springs with hardened steel construction for high-RPM, high-pressure use. The 4773 features a 1.540" OD and .640" ID and is intended for compatibility with COMP Cams 932, 935 and 26094 dual valve springs, providing solid spring centering, reducing head wear and minimizing the machining needed for older cup-style seats.
COMP Cams ID Spring Seat 1.5 X 630 X 75