ha im trying to figure out how you switch your exhaust just like that! does the jardine just bolt on? anyway ya that exhaust should show better performance after you get your supercharger on. i think the headers should help out too.
I think a lot of us have talked about the pipe issue in some other threads but ya the muffler guy told me the stock pipes are some wierd name bend which is better than what their machine can do. I think with bigger piping it will mess up your back pressure unless your runnin a turbo or sc too.