VMS Racing 04-15 Light Weight Billet Aluminum Crankshaft CRANK PULLEY Compatible with SUBARU STi 2004-2015 [ IMPORTANT ] VMS RACING BRAND (NOT generic). Comes in VMS Racing Branded BOX. Brand New in Box / Never Used / Never Installed. Weight = 1 pound 2 ounces - (4 lbs LIGHTER than OEM STOCK). Lightweight 6061 T-6 billet aluminum. VMS Racing Lightweight Pulley increases HORSEPOWER, TORQUE and FUEL ECONOMY. CNC Machined to .001 Tolerances (such tolerances usually reserved for the aviation industry). Better than OEM FITMENT & ALIGNMENT. Hard anodized in matte finish Gun Metal, for a long lasting and beautiful finish. Only OEM size Light Weight Racing pulley on the market! Uses factory sized belts (no need to change the OEM sized belts. OEM size means NO charging or overheating problems. Same Stock SIZE - SAME Stock CONFIGURATION - NO NEED to use different belts! Compatible with 93-11 Subaru Impreza 02-14 Subaru WRX 04-15 Subaru STi 94-09 Subaru Legacy 03-09 + 13 Subaru Forester 2.5L XT with the Subaru BOXER ENGINE.