This Cometic BMW 318/Z3 89-98 86mm Bore .051 inch MLS Head Gasket is designed for M42/M44 engines. It is a multi-layer steel (MLS) head gasket that is designed to provide superior sealing performance for extreme cylinder pressures, temperatures, and combustion chamber shapes. This product is made from high-quality materials and is designed to provide a reliable seal between the cylinder head and engine block. It is also designed to provide excellent heat dissipation and vibration dampening.