Hey I think i'm going to put in some 3'' piping in where my y-pipe of my exhaust is (from 3rd cat to rear where it splits). I have flows in the rear right now. Would i get a better sound from doing this as well as better flow? My stock cats would still be there unfortunatley. I think from where it splits in the rear is just 2.25'' piping still. I'm looking for a better sound, but im limited to what i can do since no exhaust shop in Indiana will take off my 3rd cat .