COMP Cams Valve Seals 5/16in PTFE W/.500 513-12

COMP Cams Valve Seals 513-12 Set of 12 PTFE Valve Seals for .500" Guide Size, 5/16" Valve Stem 513-12 - Valve Seals, 5/16" PTFE W/.500 Guide COMP Cams Valve Seals 5/16in PTFE W/.500