The March Performance 5-rib power steering pulley is precision CNC machined from 6061-T6 aluminum for extra strength, long wear, and to run perfectly true. It is finished with a No Polishing clear powdercoat to stay looking new. The keyway mounting style provides a secure fit to the power steering pump. This pulley will help increase horsepower by reducing accessory drag by 12-15 h.p. at the rear wheels.