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COMP Cams 3/8" Positive‑Stop PTFE valve seals are part of a full line of valve stem seals that prevent oil from entering the combustion chamber through valve guide clearance. The 505 PTFE option provides more clearance for dual springs while offering better sealing than O‑ring or umbrella styles, addressing applications where spring packs require a smaller seal diameter.
COMP Cams Valve Seals 3/8in Metal W/PTFE
