yeah dude, dont forget to get new seals from your local auto parts store, its sooo easy to install new injectors. $500 for used exhaust? I got a no name 2.5" mandrel bent tig welded full catback for $115 shipped brand new in the box, with hardware and gaskets, weighed in about 30lbs or something lighter than stock and sounds great and performs awsome.
As for injectors, when you get your turbo kit together, get some DSM 450's or Tunertoys 450,550, or 660 injectors, they are $200 NEW w/ new seals and are exactly like RC's.