I know its been played out but I need to find a good exhaust for my car. ITs a 2K GT its supercharged aftercooled and powerpiped making 12#'s of boost. Well the problem is I need a much better exhaust than it has. It has Stock manifolds, Magnaflow 2.5" X pipe, and a meineke butcher flowmaster jod on the stock 2.25 inch pipes. Here is the deal I wan't 1 3/4 inch primaries on the long tubes and maybe 3" back. Any opinions on exhaust systems are welcome. The Flows have to go, And the X pipe will probably have to go as well. Here is the other thing it needs to at least look like it has cats. It sounds like a pressure cooker when it runs and it held me back about 20-30 rwhp according to my tuner. He said that it is maxing the 2.5" pipe and the other components were already holding it back when it made 360rwhp. Any advice would be good. On its cooler run it made 396rwhp and 387rwtq.