Supertech Mitsubishi 4G63 EVO 9 86.3mm Bore .040in (1mm) Thick MLS Head Gasket

This is a Multi-Layer Steel (MLS) head gasket from Supertech, specifically made for the Mitsubishi 4G63 engine found in the EVO 9. It has a bore size of 86.3mm and is 1mm thick, designed to seal the combustion chamber and coolant passages between the cylinder head and the engine block.

MLS head gaskets are known for their durability and ability to handle higher cylinder pressures and temperatures compared to traditional composite gaskets. This makes them a solid choice for performance applications or when rebuilding the top end of your engine. The 1mm thickness is a common specification for many builds, and it's important to ensure this matches your engine's requirements, especially if you've had the block or head milled.

When installing this gasket, make sure both the block and head surfaces are perfectly clean and flat. Always follow the manufacturer's recommended torque sequence and specifications for tightening the head bolts to ensure a proper seal and prevent leaks.