I had JBA longtubes, o/r x and borla stinger mufflers on my supercharged 06 and it was like sex. I just put longtubes and o/r x on my 04 cobra and am still searching for the right catback. Leaning towards the stingers but I dont want to wake the world up when i go to work at 5 in the morning. I want a good agressive sound but nothing obnoxious.