COMP Cams Valve Seal Viton Gm LS1 .313 511-12

Providing the best sealing properties and spring clearance, viton valve seals are an excellent choice in performance applications. The 511 seals have a .600" OD and fit LS applications with 8mm valves and .500" OD guides. Available individually under 511-1, in a set of 16 under 511-16 Engines w/ 0.500" OD Valve Guides and 8 mm Valve Stems