Fel-Pro SS10058 Umbrella type seals. Can be used in addition to o-ring seals.
Fits 1957-1980 Chevrolet Small Block V8 engines with 0.344" (8.74mm) valve stems
Valve stem seals control the lubrication of the valve stem as it slides in the valve guide. Too little oil causes stem and guide wear. Too much oil increases oil consumption and can cause a buildup of carbon, leading to valve seat damage and early valve grind. Fel-Pro valve stem seals are made of the highest quality materials and latest technology to ensure a long-lasting seal.