Tap into hidden horsepower with a new Euro Sport crank underdrive pulley (UDP)! CNC machined from 6061 aluminum, these crank pulley kits underdrive your accessories by 23% on 4 cylinder engines and 13% on VR6 engines. This, in turn, decreases engine drag, unleashing power that you never knew you had. And since the Euro Sport crank underdrive pulleys are lighter than the OEM crank pulleys, you'll benefit from the weight reduction of rotating mass; resulting in a more responsive engine. Fitment: MK4 VR6 12v 99-02 Weight: 14 Ounces Note: Uses stock belt with included bracket