Are you looking for a deep and loud sound out of it? I met up with SouthernMudSlinger a while back and listened to his 2.3 w/ the Flowmaster 40 or Super 40 and it actually sounded real good, not ricey at all.
i think im gonna keep this setup for a while. Im unhappy with the sound, but my gas miles have shot up 2mpg like everyone else said ... got 25 mpg on flat highway doing 70, and got 23 going up to the snow today.
I havent seen over 22 - 23ish in a while, and last time i went to the snow it got 19 lol