Micah, your exactly right but here's the problem, we don't have the AccessPort available to us just yet. COBB is still working on it and we don't have a release date. So sure if we had that available to us, absolutely.
Now, he mentioned he doesn't have the money for an exhaust and from what I understand he wants to only replace the two cats and midpipe with a race pipe and no added mufflers etc. That thing will be very loud because our rear muffler is very small. Sure you can buy a quality exhaust and remove things and receive top performance, MPG etc. and not break the sound barrier, but he needs to be willing to purchase that quality exhaust first.
Lastly, I had the side exit exhaust on my SRT-4 and man was the flame awesome. Certain times I would down shift coming to a traffic light at night and many folks would ask me why I was driving a race car on the street. I would just smile and drive away.