1979-1993 Ford 5.0L Steel Serpentine 20% Underdrive Pulley Set Black making them ideal for withstanding

making them ideal for withstanding the rigors of any demanding environment

especially those that produce high horsepower

especially if you frequently have to remove and reinstall the valve cover

and all accessory gaskets--everything that you need for a complete engine rebuild

1979-1993 Ford 5.0L Steel Serpentine 20% Underdrive Pulley Set Black making them ideal for withstandingSpeedmaster underdrive pulley kits are built from aircraft quality material andcomputer machined. By reducing the speed of the accessories, these underdrive pulleys free up an average of 8 15 horsepower , while retaining full cooling and charging characteristics. Most kits can be bolted on in less than 30 minutes.