Underdrive Single Belt Crank Pulley Acura Integra Honda Civic Si CRV Del Sol DOHCThis is the VMS Racing version of the JDM (Japan Spec) Honda Civic Type R Crank Pulley, which is a special design pulley that was used in the JDM Type R that were for track use. The original JDM Crank Pulley has a slight under drive and is of lighter mass because it eliminates the A C pulley. THIS NEW VMS RACING VERSION GOES ONE STEP FURTHER BY PUTTING LIGHTENING HOLES IN ITS PULLEY TO MAKE IT EVEN LIGHTER THAN THE OEM TYPE R PULLEY!! This pulley will