Significantly boost your WRX/STI's power with the 20G Turbocharger by COBB Tuning. Perfect for street or track use, this turbocharge upgrade is capable of producing 400hp and keeping a great throttle response. Features include: single scroll exhaust housing, sleeve bearing turbo with 360 degree thrust bearings, 640 CFM, .57 A/R, 1 bar actuator, and 20G compressor housing with 68mm billet wheel.