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The Impreza WRX STi draws motorsports technology directly from Subaru expertise in World Rally Championship (WRC) competition, and is designed to appeal to the serious driving enthusiast. Impreza WRX STi is powered by a turbocharged and intercooled 2.5-liter DOHC boxer engine producing 300 horsepower and 300 lb.-ft. of peak torque, teamed exclusively to a 6-speed manual transmission. Power is transferred to all four wheels via a sophisticated Subaru All-Wheel Drive system designed to optimize performance in all conditions.