The Horton Engine Cooling Fan Clutch for Pierce is the perfect solution to properly regulate both the speed and power. With a back pulley diameter of 7.75" and a front pulley diameter of 10.24", this fan clutch is designed to fit your vehicle perfectly. Its overall length of 11.96" ensures that it will fit snugly and securely in your engine compartment. The CL3 belt configuration of 10 PK/8 PK and belt groove location of 3.37" make this fan clutch easy to install and maintain. The bolt circle of 3.50" ensures that it will stay in place even under the most demanding conditions. This fan clutch easy is to install and adjust . FleetPride is your First Click in Heavy Duty®.