The guys at Active Autowerke are still hard at, well, “werke” developing new performance bits for the E90 series BMW M3. Newest on the list is a billet pulley system that will add an extra 10 horses. The cool thing is that since its a billet pulley it will hold its own for a long time. An extra 10 horses on an M3 for just under $500 is more than worth it!
