I do have an exhaust. I already have a cat back system but need a new muffler. Its a borla turbo series muffler. It's the same muffler they use for the under car muffler (hidden) in alot of their kits. I can't stand the ricey sound from the "all in one mufflers" (i.e. boomer series) that you are refering to and come with alot of 4 banger cat backs. However the turbo mufflers do not come with a tip and you must by it seperately.

BTW all tips whether pre welded or not are for looks. At least I get a choice.