i have a flow master and i havent been messed with, dunno how loud it is though, any body from chick fil a hear it? its also connected to tanabe mandrel bent piping, as far as being lowered, i think youre ok if you spend the dough and buy a nice setup so you dont bouce down the road, ive pulled up to many cops at 7-11 and never had them say anything, but when i wasnt lowered and had a racing medallion exhaust and a kit, they told me it was illegal and i was too low