***3 Pulleys ONLY as shown - no bolts (see first picture) **barely used Benefits Increase Horsepower Reduce Drag Features Billet Aluminum Installs with simple hand tools Fits 1979-93 5.0L or V8 Mustang What's in the Box (1) Crank Pulley (1) Water Pump Pulley (1) Alternator Pulley Direct Bolt On Give your 1979-1993 Mustang more horsepower and torque with a set of Special Vehicle Equipment underdrive pulleys. This underdrive pulley kit is a great direct bolt on to increase performance in your 5.0L Fox Body. With a few simple hand tools, you can easily swap out your stock pulleys with these lighter, resized pulleys for a noticeable difference in power! Less Accessory Drive Drag Underdrive pulleys are resized pulleys designed to drive a vehicle's accessories at a slower rate than the factory. Each kit features a new crank, water pump, and alternator pulley to reduce the amount of power your accessories use, and free up horsepower that was once robbed by your accessory drive. Gains of up to 10+ hp and 2-3 mpg have been seen with the installation of an underdrive pulley kit. High Quality Construction This kit is manufactured from billet aluminum to give you a strong and lightweight addition to your 5.0L V8 motor. With a lighter pulley, you get a quicker spinning accessory drive that will operate more efficiently, increasing horsepower and torque. This kit features a black finish to add a clean look to your engine bay! Pulley Measurements Alternator Pulley - 2.454" Crank Pulley - 4.618" Water Pump Pulley - 5.437"