BMW S54 UNDERDRIVE VÄNTVÕLLI RIHMARATAS PK6
Custom orders available .
AAMANN lightweight billet aluminum crankshaft pulley underdrives each of the accessories by 14,6 %
We recommend this pulley not be used on a street car, race use only.
Underdrive pulleys will yield a small increase in horsepower anywhere from 8 to 15 hp.