There are a couple of guys here with NOS, been thinking of doing it myself, after having it done on an calibra. On that I went sraight for the NOS and it killed the standard exhaust. Don't ask me why, may of been just bad luck (sure one of the NOS guys will tell you why)
The tips I've got is go for the Induction kit,exhaust and Ecu, then get the big guns in.