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COMP Cams Positive Stop PTFE valve seal (fits 5/16" valve stems) keeps oil from entering the combustion chamber while providing extra clearance for dual springs. The .600" outer diameter seal is smaller than umbrella-style seals to permit use with double springs, offering improved sealing over o-ring or umbrella designs and compatibility with .500" guide bores.
COMP Cams Valve Seals 5/16in PTFE W/.500
