08 gt 500 with 590 rwhp and 600 ftlb. I'm currently running bbk off road x-pipe and flowmaster outlaw mufflers. Very loud and sounds mean as possible. I am switching to bbk catted x-pipe on sat and wanted to know if anyone had a similar set up and were you ok with emissions test. Me(if your state requires) My car is a full bolt on only leaving stock headers at this time. Pushing near 16 psi and correctly dyno tuned. Some feedback would be great. I do know about kooks cats but we are talking about over a grand for two cats. How much was the sound reduced with the catted pipe? Any help out there?