COMP Cams Spring Seats .060 X .570 X .9 - cca4677-16 missing-image Mufflers & Tips::Catalytic Converter Universal

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COMP Cams Spring Seats .060 X .570 X .9 - cca4677-16 missing-image Mufflers & Tips::Catalytic Converter UniversalThe older style standard shims will not hold up to the extreme spring pressures and high RPM found in racing engines being built today. COMP Cams offers a simple but effective solution to this problem a thin, hardened steel alloy seat which will not only protect the head and shim but also locate and hold the spring in place. Previously, this part has been available only in a cup form with the retaining portion being on the outside of the part. This