I need to put a muffler on but which one? Right now I'm running a straight pipe with no cat or muffler. I want somthing that will tune it down a little. I still want it loud as fook. I was thinking of a spintech with 3" in at dual 2 1/2" or 2 1/4" out. I want it to be loud still. Is there a way to order custom mufflers like that from spintech?