I put the the loudmouths on my stock 2005 mustang. They Sounded awesome. I then put long tube headers and H pipe on them and then they became to raspy and trumpeted to much. I then put 18 inch vibrant resonators on, and that made them awesome again. Here is a clip for you. I like them. Set's off alarms everywhere, wakes up the neighbors in the morning, and at car shows everyone looks and asks about the exhaust. Cops haven't bothered me, can't hear the ricers when I get on it, and that was the most important thing for me was not to hear that stupid fart can.
http://www.youtube.com/watch?v=xBg9rxlk6t0