I am running the stock svt exaust with a straight pipe in place of the resonator. Other than that the engine and exaust is stock. I'm not mystery modded, tell you the truth I don't even know what it is. I always thaught that my car produced slightly higher numbers than whats the norm. With just a bat intake and k&n filter I hit 174 hp. so the supercharger was bolt on 100 hp at the wheels, i was suprised at that too.
