Torque Solution Underdrive Crank Pulley KitTorque Solution Underdrive Crank Pulley Kit w o AC Applications: Porsche 996 997 986 987 without AC Torque Solution Underdrive Crank Pulley has been designed to improve performance by being lighter and smaller than the OEM crank pulley. This results in less engine load which in turn produces faster revs and increased throttle response. Made from high quality CNC machined 6061 T6 billet aluminum to be lightweight without sacrificing strength. The black