Supertech BMW 5mm Stem Viton Intake Valve Stem Seal - Set of 12

Made with Viton, these valve stem seals are built to handle the heat and stress inside your BMW's engine. The 5mm stem size is specific to certain BMW applications, ensuring a precise fit when you're rebuilding or refreshing your cylinder head. When you're working on the top end, replacing these seals is a smart move to prevent oil from leaking past the valve guides and into the combustion chamber, which can cause blue smoke on startup and increased oil consumption.

This set includes 12 seals, enough for a typical inline-six engine. Viton is a well-known material for its resistance to high temperatures and aggressive oils, making these seals a durable choice for keeping your engine running cleanly. Installing them correctly ensures they seal tightly around the valve stem, maintaining proper oil control and compression.