Brian Crower Polaris Pro R Fury 2.0L Valve Stem Seals for BC3966-2 Valve Guides BC3992-2

BC valve stem seals are designed for BC’s exclusive, threaded end valve guides (BC3966-2) that prevents the seal from popping off the guide. The 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.