get 550, an s-afc, and a 2G mas(or maf-t setup) and run 20psi on the street.
For the exhaust, you might consider two things:
-run a full 3" with resonators and a high-flow cat. This shouldn't be too loud
-or, check out one of these:
http://www.atpturbo.com/root/releases/release091004.htm