11/32" Viton Valve Stem Seals (Suits: 0.530" Guides) Heat-treated internal parts

Heat-treated internal parts

Dress up your oil system with a oil pan from PCE

and large HEIs or DuraSparks

each Manifold is 100% pressure tested for leaks to eliminate installation problems

Provides very positive shifts for high performance street use or for competitive events

11/32" Viton Valve Stem Seals (Suits: 0.530" Guides) Heat-treated internal partsValve 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. Speedmaster valve seals are posi stop seals made from high temperature Viton material for a long lasting seal.