Some exhaust, if not all, claim in the range of 5-15 WHP for their exhaust systems, now since the MP3 has kinda already an aftermarket exhaust, would going to a Greddy or a Magnaflow for example be worth any WHP at all?
Obviously the biggest gain is a combo of intake, header, exhaust, to completely open up the flow.
Obviously the biggest gain is a combo of intake, header, exhaust, to completely open up the flow.