BMW S50 , M50 UNDERDRIVE ROOLIPUMBA RIHMARATAS PK6
Custom orders available .
AAMANN S50 - M50 lightweight billet aluminum steering pump pulley 152 mm .
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.