Supertech BMW N54/N55/S55/B48/B38/B58 Viton Integral Intake Valve Stem Seal - Single - VSI-BM50-I

Valve Stem Seals

Supertech intake valve stem seals are made from a high quality rubber compound, while our exhaust applications feature a special high-temperature compound for improved durability in the harsh thermal environment on the exhaust side.

Properly functioning stem seals meter oil to the valve stem and guide — enough for lubrication, without allowing excess oil into the port. Every Supertech seal is manufactured to precise tolerances for a secure fit on the guide and consistent oil control.

Key Features

• High quality rubber compound for intake applications
• Special high-temperature compound for exhaust applications
• Precise oil metering for lubrication without smoke or deposits
• Secure, positive fit on the valve guide
• Sized per application for correct stem and guide dimensions
• Available for both intake and exhaust, sold by application

Applications

An essential part of any cylinder head rebuild. Always replace stem seals when servicing valves or guides, and match the seal to your engine's stem and guide dimensions.