I actually floored it going by a cop and "she" didnt even ask about my cats or exhaust when she pulled me over (for not using a turn signal). I run an O/R Pypes H and no mufflers with Magnaflow tips, its really loud. When cops are around, I just keep the RPM's as low as possible.
Here is a quick video of my 07 GT with pypes offroad H and custom muffler deletes with magnaflow tips.
My camera is supercompact so the sound isnt too good, but check it out.
http://www.youtube.com/watch?v=18zFLY5EnS4
Sounds damn good, I was about to order the Violators to complement my Pypes OR H, but welded on some straight pipes instead. As for your new word to copyright "deep-throaty", I think people may get the wrong idea.