COMP Cams Valve Seals 5/16 Viton Metal Body - 520-16

Set of 16 Metal Body Viton Valve Seals for .530" Guide Size, 5/16" Valve Stem

Application: Engines w/ 0.530" OD Valve Guides and 5/16" Valve Stems

Providing the best sealing properties and spring clearance, viton valve seals are an excellent choice in performance applications. The 520 seals have a .575" OD and fit applications with 5/16" valves and .530" OD guides.

5/16 X .530 Viton Metal Body Seal 575 OD

COMP Cams offers a complete line of valve stem oil seals, from the stock GM o-ring to the positive-stop PTFE seal. 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 seal is normally used when a larger than-stock diameter spring is used, and in the case of a double spring, the positive stop PTFE seal is used. Smaller diameter Viton seals are also available for triple spring applications. Both the o-ring and the umbrella seals require no machining, but when using the PTFE seal it is necessary to disassemble the heads and machine the top of the guide with a special cutter.