If you are looking to run an electric water pump then add this Steeda crank pulley at the same time. You will not only pick up horsepower with the electric water pump but also get the same benefit of having underdrive pulleys. This Steeda crank balancer is the best on the market. Steeda uses the latest technology directly from O.E. sources. Steeda's crank pulley is a one piece nodular iron, injection molded rubber design. Special rubber materials were chosen for their ability to absorb the torsional vibrations and their ability to withstand underhood temperatures.