  TurboXS Exhaust and Up Pipe 2002-07 WRX and STI
TurboXS builds their exhaust with one thing in mind: Power! Using an in-house Dynapack four-wheel dyno, the TurboXS engineers tune, test, and tinker until their exhaust pieces produce more power than any others. (Above: Dyno tests show an increase of 26.5 hp at the wheels from adding the TurboXS turbo-back exhaust.)
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