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The COMP Cams inboard ID spring seat centers and secures dual valve springs with hardened steel construction built for high RPM and heavy spring pressures. The 4772 lists a 1.550" OD and .570" ID and is compatible with COMP Cams 925 and 939 dual valve springs, providing reliable centering, head protection and reduced machining compared with older external-retaining cups.
COMP Cams ID Spring Seat 1.5 X 570 X 75
