I like Flowmaster personally. I felt an increase in top end with mine but a small decrease i think on the bottom end. But that was cuz i replaced a Dynomax muffler. The Dynomax was ok but wasnt loud enough. So I went with a 2-chamber. The idle is very loud with a low rumble. On the higher RPM's it doesnt scream like i wanted but still was a lot louder than my friends 97 TA with a 3-chamber.

 

I have hooker on mine and I love it! the only thing that bugs me is it is quiet at idel.. my buddy just got the ammerican thunder cat back and it is louder at idel, but when he stepped on it, it was not as loud or as nice sounding as the hooker....

Get a hooker..she is worth it!