Its not illegal. All muffler shops will do it without a cat as long as it is a straight pipe. florida law changed, it is legal to have no cat as long as it is a straight pipe. There is a place over in The Bradenton Area That did my Turbo Exhaust for 200 $ no cat no res. 3" piping all the way back. pm me if u want more info, or just ignor if it has been done.