Replace your existing water pump pulley with The Cool Pulley and you will see a change in your water temperature after a run. The cool pulley has 14 teeth instead of the standard pulley’s 10, and therefore it can cool 40% faster. It’s polished finish dresses up any engine compartment. The cool pulley will fit on any Mr. Gasket or Moroso Pump. (No need to change belt, in most cases.)