5150 AutoSport Head Gasket & Head Stud Kit, BMW M42 / M44
MLS Head Gasket: This Cometic MLS Head Gasket is specifically engineered to replace BMW part # 11121721546, 11121721547, 11121721550, 11121721551 for the M40B16, M40B18, M42 B18, or M44 B19 engine. The M40 and M42 factory head gasket specifications are 84mm Bore with a thickness of 0.070 inches. The M43 and M44 factory head gasket specifications are 85mm Bore with a thickness of 0.070 inches. Comprised of multiple layers of stainless steel, MLS Gaskets are durable and corrosion-resistant. Ideal for high-performance engines, MLS head gaskets offer superior sealing and can withstand high levels of heat and pressure. MLS head gaskets can NOT be used with motors that have O-rings or receiver grooves around the cylinder bores because they require smooth and flat surfaces to seal. Don't see the MLS head gasket you're looking for? More bore and thickness options are available here. MLS Installation Instructions: Make sure that the engine block and cylinder head surfaces are clean, flat,