I have an 07 FX2, 4.6 L, I am in south Florida on vacation for 3 months. I am going to put a duel system on the truck, however I am looking for a muffler with better flow than stock but just as QUIET. Any suggestions??

Has anyone had any exp with a shop in Ft myers called Waynes Custom Muffler Center?? Any suggestions re a shop in this area???