Ferrea 5/16 / 8mm .500in ID Viton Hi-Temp Exhaust/Intake Valve Stem Seal - Set of 16

If you're rebuilding the top end of your engine, replacing the valve stem seals is a critical step. These seals keep oil from leaking down the valve guides into the combustion chamber, which can cause blue smoke on startup and increased oil consumption. Ferrea's VS1021 set is designed for this exact purpose, ensuring a proper seal for both intake and exhaust valves.

These seals are made from Viton, a high-temperature resistant material that holds up well in the demanding environment of the engine's cylinder head. The .500 inch (or 8mm) inner diameter is a common size, and the set includes 16 seals, enough for a typical 8-cylinder engine. Proper installation of these seals is key to preventing oil burning and maintaining engine health.