3-Piece Underdrive Accessory Steel Pulley Kit Note: Fits 1994-95 5.0L GT Models Only Built from aircraft-quality computer machined steel or aluminum alloy, these popular underdrive accessory pulley kits have become one of the most sought after bolt-on's available for today's cars and trucks. By reducing the unnecessary speed of the accessories, these underdrive pulleys free up an average of 8-15 horsepower while retaining full cooling and charging characteristics. Kit Includes: Crank Pulley, Waterpump Pulley, Alternator Pulley, HP & Torque: 8-15 hp/15 ft lbs Torque, Installation: Most pulley systems retain the factory serpentine belt and can be bolted on in under 30 minutes.