Supertech Mitsubishi EVO X 4B11 Integral Valve Stem Seal - Single (Drop Ship Only)

These integral valve stem seals from Supertech are made with a 5.5mm stem diameter, specifically designed for the Mitsubishi EVO X 4B11 engine. They help prevent oil from leaking down the valve guide into the combustion chamber, which is crucial for maintaining engine performance and reducing oil consumption. When rebuilding or refreshing the top end of your EVO X, ensuring your valve seals are in good condition is a key step to a healthy engine.

The integral design means the seal and its retainer are a single unit, simplifying installation and ensuring a secure fit. This well-built component is essential for proper valve sealing, helping to keep your engine running smoothly and efficiently. Proper sealing also contributes to cleaner emissions by minimizing oil burn.