I have a Magnaflow Oval muffler on my 2.25" catback and it sounds NIIIICE. One of the best I have heard (probably some bias in there tho
) Its barely there at idle, but when you open it up its nice and deeep. I have a 22" resonator which takes the tinny note out of it, and quiets it down some too. Big 2 thumbs up for it.