Several company's make an aftermarket kit for the idi, but in my opinion the only way to go is with the ATS kit. Banks and others make the down-pipe to fit the exsiting turbo, this is 2.5 or 2.25 (can't remember) then go to the larger pipe 3 0r 3.5. ATS kit has the new "flange" for the turbo that is 3", and matches the rest of the exhaust. ATS designed the turbo for Fix Or Repair Daily then they went and screwed it up. Remember what ever you install to make sure that the muffler is "straight thru or see thru" what ever term you use. Once you have the exhaust done do the intake system, the stock snorkel really is a joke. Not enough cold air. For the engine to really work you need lots of cold air and low back pressure. While you have the exhaust "out" you may want yo install a pyro (especially if you are towing or live in a hilly area) Hope this helps.