BMW S54 Pulley Kit for E46 M3 Z4M Z3MDesign VFEs S C Pulley Kit is designed to optimize rotational speeds when using larger superchargers pushing 12 18 psi. The units are carved from aerospace spec aluminum stock and then triple hard anodized before being rotationally balanced. Intended for ultra high output S54 BMW engines Requires built motor with forged internals 1 main crank pulley 1 water pump pulley 1 alternator pulley 1 power steering pulley E46 M3 (2001 2006) E85 Z4M (2006 2008)
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