2007 scion tC 3.0 release series?

i want an exhaust for my car and apparently the TRD ones that come stock with some of the tc's dont give much hp, just noise. i'm not looking to make my car super fast but i wanna be able to keep up you know? if you have a scion tc with the TRD exhaust whats your experience with it? even if you have a different kind tell me about it please and thanks :)