BDL 3" drives are made out of 356-T6 aluminum, all pulleys are cast in BDL foundry and completely machined in house. Ongoing quality control ensures that every pulley will be exact in every aspect, as BDL customers have come to expect. These drives are supplied with BDL "Competitor Clutch" and spring pressure plate Kit designed for Tapered Engine, Kick Start only set ups Replacement belt is 600-0442 Replacement clutch pack is 162-473