So i just bought a 2007 srt8 about two weeks ago. So far ive got a k&n air filter on it, and have done a mid muffler delete. Im wondering where to start next? I will be re doing the exhaust. It sounds good but not quite where i want it. I am thinkin new piping ( any suggestions on what size tubing would help, 2 1/2, 2 3/4, 3?) and some flowmaster super 44s. My next step is what i want some opinions on. what will deliver the most performance for the money? Headers, diablo tuner, cams? Let me know what your experience has been with different mods