[dsmtuner1987]

turboing an rs is not easy, and well, for the price of the kit you prolly are gonna get and the car you have if its in good shape, you could prolly buy yourself a gst for the money. the rs and the gs (all of them) models have two completely different engines.

as for the question, it would prolly be better to get an exhaust shop make you a 2.5in system (dont go bigger unless you get serious with that turbo) from the cat-back and you would have more options on what it would look and sound like.