Sorry, I didn't mean to confuse you. But your question confused me.
3" is meant for turbo'd cars, as optimum performance, not OEM. I've read your question twice and still am under the impression you will end up with a lot of noise. I believe a car with a very loud muffler/ exhaust system, is uncool.
Your question, does the muffler center in the bumper is rhetoric, of course it does! But stuff like the gastank, space for the spare tire, (upgraded) swaybar etc. are equelly important then a center muffler.
This also means, you can pull it off, if you really want this. Take a look at the place of the parts I mentioned and the space the stock muffler has and what space you have on the other side.
If you want to drop the car a few inches, that will become a problem.
Better first decide how much drop you need for handling and then start thinking about bodykits/ custom exhaust in a not OEM place. That way you won't regret when you are done.