The M20B25 and M20B27 factory head gasket specifications are 84mm Bore with a thickness of 0

Up to 2000 HP handling capability

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

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ARP Head Stud Kit, BMW M20 E39 530i The M20B25 and M20B27 factoryThe M20 B20, B23, B25, B27 is a 6 cylinder engine that was used in a variety of BMW models, including the E12, E21, E28, E30, and E34 3 Series, 5 Series, and 6 Series, among others. Installing ARP head studs 201 4305 on a BMW M20 engine can provide several benefits, including increased clamping force and improved head gasket sealing, which can help prevent head gasket failure. This is particularly important on high performance or turbocharged engines,