Hey guys i have a 2006 G6 Gt and i was thinking about putting an after market exhaust system on it. right now its single tip but i got the concept body kit and now tht it has a second port i was thinking bout making it duel. my question is which kind of exhaust would be recommended, performance and soundwise. i wanna do a cat back but i dont know what the performance increase would be. would it be worth it or better to just get muffler and tailpipes. and i want more of a deeper growl kinda sound not that ricy sound. could i get any of that with a 3.5 V6? any suggestions?