About 3 week ago, I was driving down the road, a car was in front of me, they slowed to turn right, but didnt merge off the side of the road (which I hate when people dont turn, they just slow in the middle of the road, besides that) I got on it a little to go around them, car downshifted from od to d, and I heard a metal thing go flyiny behind the car, at least what I thought. After that, I noticed my exhaust sounded wierd for some reason. It has a semi deeper tone, but it just does not sound normal. Exhaust set up is stock headers, stock 4 cat h pipe, stock cat back with flows welded in place of stock mufflers. Could maybe I have blew out a cat or clogged a cat, or blew out some of the muffler? The mufflers are not old at all, and it doesnt sound like an exhaust leak, I know what they sound like.