as far as the new exhaust goes, the idea is to have a good non restrictive Dump Pipe where it meets the turbo end then just a nice free flow muffler combined with the 3 inch piping. i have seen some good looking systems on ebay [ not the stainless stuff ] but in the black steel systems that are priced well . look at the pipe kit only on ebay which comes with the dump pipe and the 2 remaining pipes then buy a good free flow muffler to suit the pipe size which are selling for $100 [ redback brand ] i am sure this set up will give your engine a nice boost and sound plus save you some dollars that most exhaust shops sell there systems for. it all comes down to the dollars you have free to go in the long run.