Brian Crower BC3992 - Polaris XP Turbo / XP 1000 Valve Stem Seals for BC3966 Valve Guides

BC valve stem seals are designed for BC’s exclusive, threaded end valve guides (BC3966). These Viton seals allow a carefully defined amount of engine oil from the cylinder head into the combustion chamber—to lubricate the rotating valve stem in the valve guide. BC valve stem seals are produced from high performance materials for increased part life and lower wear.