I have loudmouths with a catted x and possibly want a change. If I do change, I will be taking my cats off and inserting some new mufflers in the catback. My question is which mufflers are a direct bolt in fit? Also what is the loudest chambered muffler? I am leaning toward mac but I want something that is still as loud or louder than my current but has a deeper tone. Is offroad x and mac as loud as catted x and loudmouths? Thanks.