Available individually under 504-1, available in a set of 12 under 504-12
Typically requiring no machine work, our 504 umbrella seals are a great option for stock guide applications with 3/8" valves needing a seal replacement.
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 guides. Normally used when a larger-than-stock diameter spring is used. Requires no machining.
