Supertech Performance VSI-BM50-I Viton Integral Intake Valve Stem Seal 5mm BMW

The Supertech Performance VSI-BM50-I is a Viton integral intake valve stem seal designed for BMW engines with 5mm valve stems, including B38, B48, B58, N54, N55, and S55 applications. Viton is a fluoroelastomer that handles high temperatures significantly better than standard rubber compounds, making these seals ideal for performance and high-stress applications.

Key Features:

• Constructed from high-quality Viton rubber compound for improved durability
• Rated to 400°F continuous operating temperature
• Resists degradation from E85, race fuel additives, and oil exposure
• Integral design for precise fitment on 5mm intake valve stems
• Reduces oil consumption and maintains optimal combustion
• Prevents oil leakage past valve guides into combustion chamber

Supertech valve seals are the final piece of the puzzle for your performance valvetrain. This single seal is priced individually, allowing you to purchase exactly what you need for repairs or complete engine rebuilds. These are the go-to intake valve stem seals for performance builds, engine refreshes, and preventative maintenance on BMW platforms.

Application Note: For a complete engine repair, you will need 8 of these intake seals (one per intake valve in typical BMW inline-6 applications). Compatible with both OEM 5mm intake valves and aftermarket performance valves using 5mm stems.