I am going to buy a belanger complete exhaust system, and I looked uder my 2000 gts and noticed at the rear of my car that exhaust ends up coming out of 1 muffler. so technology I dont have a dual exhaust?. but I would like to do is convert it over maybe to a side pipe style that way I can have a dual exhaust, and gain more HP. can this be done if I buy new side sills with exhaust exits like the old gen 1s. I want to try and get the best performance out of my exhaust. or with the hp numbers not be that great with either setup, thanks for the help Venom1 of salt lake city,utah