Get back the power and torque your belt-driven accessories steal. Bolt on 8-10 horses with Steeda’s underdrive pulleys. These pulleys slow down your accessories about 25%, reducing the drag on your engine. They can even bump up gas mileage. These pulleys are manufactured from billet steel, exceeding factory quality. The crankshaft pulley uses a high-tech injection molded bonded rubber damper, making it far more durable than any other underdrive pulley on the market.