Nsanggt03,
You should check out
http://www.psifimotorsports.com
They offer High Performance parts for the SRT-4. I saw four of their cars and they were wicked.
I went to see them over the weekend and see if the stuff they offer would fit in a PT. They said it would. They offer SRT-4 T3/T4
Turbo Upgrade, Intercoolers, Intakes, Motor Mounts, ECU Tuning
and more.
I plan on getting the ECU Tuning PowerPaq along with Stage 1 next month. They are located right by you in South Jersey, Gloucester Twp.