Turns out that the AC compressor came loose enough to cause the belt to jump off the ribs halfway on the crank pulley. I'm lucky I caught it now before the belt got shredded and left me stranded somewhere, I put red loctite on the bolts so they should be alright.

Car runs nice and quiet now, wait I mean engine- the flowcrappers are still loud as hell lol. So any more advice on what to do with the exhaust?