Eliminate gyroscopic imbalance and belt whipping found in many 3" drives with a BDL drive kit that puts the inner hub a full inch further inboard than most other belt drives. With the rear pulley further over the main shaft virtually all instability in the primary drive is eliminated. The 8 mm pulleys are hard anodized and use a special belt that traps less air than HTD belts. The rear pulley has a double row bearing that supports a Stressproof steel clutch hub. Also included are a clutch and polished aluminum pressure plate. Safety guards are always recommended with 3" drive systems.