COMP Cams Valve Seals 523-32 Positive Stop PTFE Valve Seals for Ford 5.0 Coyote Providing the best sealing properties and spring clearance, viton valve seals are an excellent choice in performance applications. The 523 seal has a OD and fits applications with valves and OD guides. COMP Cams Valve Seal 6mm Stem x 11mm Guide OD
