The Kartboy crank pulley is milled from a shiny block of billet aluminum. Unlike some other manufacturers, Kartboy doesn't make the lightest possible pulley -- although at two pounds, it's still about 60% lighter than stock. The mass of the pulley is enough to not upset the ECU, which is nice, especially if you have (or will have) a lightweight flywheel. (If you haven't heard of this problem, if you put a lightweight flywheel and crank pulley on a Subaru motor, the ECU can get upset because it sees the crank speed accelerating faster than it thinks it should, which can result in a Check Engine light.) The Kartboy crank pulley fits all 2002-2014 WRX and 2004+ WRX STI. The diameter is the same as stock, so standard belts will fit fine. Note that 2008+ cars have a stretch-fit a/c belt with no tensioner. Fitting this belt with the aftermarket pulley is difficult, and there is the possibility of tearing the belt in the process. You have been warned.
Black anodized finish.
Fits all 2002-2014 EJ-motor cars, including Impreza, WRX/STI, Legacy, and Forester. Also fits 2015 STI. Does NOT fit 2015+ WRX.