i know what thread you are talking about (in fact i have that chart saved)...but to me super 40's are loud....the ultraflows are not as loud according to that chart- therefore i dont really consider them loud, especially with an x pipe which is going to quiten them down...dont get me wrong, if i dont end up going with something else i will probably go with the ultra flows for the fact that they flow very well, but ive never really been to impressed with the sound...as far as borlas go, havent heard enough from the mopar guys as to how they sound, which is why im asking here8)...designer or not they sound and flow good too, and if they are louder, all the better for me