5150 AutoSport Head Gasket & Head Stud Kit, BMW N55/S55

MLX Head Gasket: The Cometic MLX Head Gasket is designed as a direct replacement for BMW part # 11127599212, 11127599213, 11127849620, and 11127849621 specifically for use in N5B30 and S55B30 turbocharged inline-six engines.  Composed of multiple layers of embossed coated and uncoated stainless steel, MLX gaskets are specially designed to conform to the surfaces of the cylinder head and engine block on the first heat cycle, creating a chemical bond via Cometic's proprietary coatings. These coatings provide a micro-seal for fluids against the head and block surface.  The layers of the MLX gasket act as a spring, protecting against blowout and increasing active seal height by compensating for increased head lift.  MLX Head Gaskets are different from MLS because they feature an extra,specialized 'stopper' fold-over layer. This layer provides a torque limiting surface that prevents yielding of the combustion seal.  It's important to note that MLS/MLX head gaskets are not compatible with e