Custom orders available 

BMW M42 , M43 , M44 - UNDERDRIVE RACE CRANKSHAFT PULLEY with trigger wheel . STD pulley for PK6 belt use with OEM other pulleys , can be ordered for PK4 or PK5 belts . Pulley diameters available 100 to 130 mm .

For installation on the M43 (after 09/95), M44 engine you need M42 crankshaft hub 11211721099 .