Comp Cams Valve Seals - O-Ring - Stock Guide - 11/32" - (Set of 16)

COMP Cams® offers a complete line of valve stem seals, from the stock GM O-Ring to the positive-stop Teflon® 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, in the case of a double spring, the positive-stop Teflon® seal is used. We also have a smaller diameter Viton seal available for triple spring applications. Both the O-Ring and the umbrella seals require no machining, but with the Teflon® seal it is necessary to disassemble the heads and machine the top of the guide with a special . 530 diameter cutter. Whenever you are planning an engine overhaul or a cam change, don't forget the valve seals.