50mm Exhaust   Rally / Race  318° Intake / 318° Exhaust   12

One-piece crank hub/timing gear

Crank hub issues have plagued BMW N55 and S55 engines for over a decade—causing crankshaft spin

Ferrea's exclusive two-step slow forging process optimizes grain flow

Cometic Multi-layer Steel Head Gasket, BMW N54 Bore Size - Thickness:85 mm - 0.048" 50mm Exhaust Rally / RaceThis Cometic MLS Head Gasket is designed to replace BMW part numbers 11127557265 and 11127557266, specifically for the N54B30 engine. 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