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This COMP Cams Positive-Stop PTFE valve seal fits 3/8" valve stems with .500" guides and a .600" seal diameter. It keeps oil out of the combustion chamber while providing additional clearance for dual-spring assemblies. Smaller than umbrella seals, this PTFE design enables use with double springs and improves sealing over traditional O-ring or umbrella styles for high-performance valvetrains.
COMP Cams Valve Seals 3/8in PTFE W/.500
