Go Fast Bits Underdrive Pulley Kit - 2004-2007 Subaru WRX / 2004-2007 STI

HIGHLIGHTS: Includes lighter crank, power steering, and alternator pullies Improves the engine response by removing rotational mass Nice black finish to improve the engine bay aesthetics  Go Fast Bits Underdrive Pulley Kit SPECS: Includes crank pulley Includes power steering pulley Includes alternator pulley Made using lightweight aluminum materials Anodized black finish Improves engine response Increases faster revs AC compressor will still operate at normal speeds Includes new belts   IMPROVE THE ENGINE RESPONSE WITH LIGHTER PULLIES The Go Fast Bits Underdrive Pulley Kit is a lightweight set of underdrive pullies that have been designed to help remove some rotational mass from your engine to improve the overall performance. The result is improved engine response, faster revs, along with improved power and performance.