you dont need a tuner to do what he wants.
You cant get rid of the o2's since the front ones control your fuel consumption. If you get rid of the rears you'll throw a check engine light.
You can get rid of the cats, just have an exhaust shop weld in 2 more o2 bungs about a foot behind the bungs in the headers. Plug in the front o2's into the header bungs and then screw in spark plug non-foulers into the rear bungs, and the rear o2's into the non-foulers. They pull the o2 sensor slightly out of the exhaust flow and trick them into thinking there are cats there (gets rid of the CEL)
This is the exact route I did (Pacesetter longtubes, no cats)
