Are you talking about flowmasters p/n 524554,it has dual 2.25 inlets and outlets. Not sure about the mufflers overall size as its not stated on flowmasters site,but it looks like it might work in place of our suitcases.I'm running super 40s w/ resos deleted and although they sound great at idle and WOT, the drone at freeway speeds can at times be totally obnoxious,D.:beerchug: