Power Pulley, Threaded, Laser Etched, 5-3/4″ Diameter



Replace your stock diameter crank pulley with this Power Pulley from EMPI. This aluminum 5-hole design pulley is smaller than the original crank pulley and has black timing marks. On a stock set up, the crank pulley is larger than the generator pulley, so the fans spins more than once for every rotation of the crank. A smaller diameter crank pulley (or power pulley as it is sometimes known) changes the ratio between the two, effectively reducing fan RPM relative to engine rotation speed.