5150 AutoSport Head Gasket & Head Stud Kit, BMW M40/M42/M43/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. Multi-Layer Steel also known as "MLS" head gaskets are preferred as an aftermarket alternative for high-performance BMW engines, including supercharged and turbocharged models, as they offer better performance than factory gaskets. 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. MLS Gaskets provide maximum sealing performance for high-output engines, without the need for sealants. These gaskets resist shearing forces and reduce bore distortion with their embossing design. Comprised of multiple layers of stainless steel, they are durable and corrosion-resistant. Ideal for high-performance engines, MLS head gaskets offer superior sealing and c