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    What Can i do next / Need more power ;)

    Hello! my names art, I have an 05 GT mustang (automatic) I have k&n intake and flow master Exhaust 2.5inch Piping cat back. My friend has a 05 Subaru STi we both bought our cars in may, and we were a good matchup.. he got a few mods and a tune now he has 310WHP :( and blows me away...