You'll have two catalytic converters to contend with. One in the mid-pipe down under the back of the engine, and the other is in the mufler assembly under the seat. Getting rid of them both while keeping it quiet? I dont see that happening as no aftermarket mufflers are quiet, and it'd take an act of congress to get the converter out of the stock muffler and keep it quiet at the same time. As far as mid-pipes that work with the stock muffler.. I really dont know if any are available that do. It would be a semi-pointless product to make because you'd eliminate the cat off of the horizontal cylinder, but you'd still have a cat on the vertical... ya see what I'm saying? but yes, Changing the exhaust over to an aftermarket setup.. half or full system will reduce the heat on the hiney.