COMP Cams Valve Seal 3/8in UmBRella

Fits: 3/8" Valve Stems - OE-Size Valve Guides (.900" Outer Diameter)Valves Seals keep unwanted oil from entering the combustion chamber through clearance in the valve guidesNormally used when a larger-than-stock diameter spring is usedRequires no machining. Typically requiring no machine work, our 504 umbrella seal is a great option for stock guide applications with 3/8" valves needing a seal replacement. Available in a set of 12 under 504-12, available in a set of 16 under 504-16 Engines w/ Stock/Unmodified valve guides and 3/8" Valve Stems