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COMP Cams offers a complete line of valve seals, from the stock GM O-rings to the positive-stop PTFE seals. These seals are a must to keep unwanted oil from entering the combustion chamber through the clearance in the valve guides. The O-ring seals use the standard retainer and oil splash shield. The umbrella seals are normally used when a larger-than-stock diameter spring is used. In the case of a double spring, the positive stop PTFE seals are used. For triple-spring applications, use the smaller-diameter Viton® seals.
Valve Stem Diameter:0.313 in.
Valve Stem Seal Type:Positive stop
Valve Stem Seal Material:Viton®
Machine Work Required:No
Valve Guide Diameter (in):0.500 in.
