I hope some one can help me with this. I have an 06 GT and am adding a C&L CAI. The C&L came with the Diablosport tuner with the tune for the CAI. I am planning on also installing MAC long tubes with an off road "H" pipe (not cats). Will I need a new custom tune for this installation? How about turning off or eliminating the rear O2 sensors to avoid a CEL? Where can I get the tune if needed. (No speed shops in my area.) I hope this is not a dumb question. I'm just a newbie.