I believe there are a few free mods that should qualify.

1: Get the boost up to spec (12-13psi)
2: Disable the EGR and clean out the intake
3: Adjust the ALDA
4: Fine tune the tranny shift points and firmness to your preference
5: Disable the seatbelt buzzer

All these are free (from cost, not labor) and will result in a fine-tuned car that you will enjoy driving even more.