I got to hear a setup with the mac long tubes, pro chamber and the black cat backs in 2.5 inch. The car sounds nice as hell. Im not worried about fitment, nothing a torch and prybar cant fix. That and I can always weld in some super 40's or original 40's. The guy who owns the car said the only issue he had was the prochamber fitment to the cat backs. I will mock it up before I install it. Plus he told me to install the headers BEFORE I dump in the motor and tranny.