Tap into hidden horsepower with the FocusSport crank underdrive pulley. This kit includes a 6061 aluminum lightweight crank underdrive pulley and a new accessory belt. This FocusSport crank pulley underdrives your accessories by 23%. This, in turn, decreases the drag on the engine, unleashing power that you never knew you had. And since the FocusSport (7.6 ounces) crank underdrive pulley is lighter than the OEM (3 lbs. 4 oz)crank pulley, you'll benefit from the weight reduction of rotating mass; resulting in a more responsive engine. FocusSport crank underdrive pulley comes in a red anodized finish. Fits 16V Zetec and Focus SVT.