Anyone go through this yet? I bought our 2015 used almost two years ago from it's original owner. I've had a rattle internal to the rear muffler pretty much since we've owned the car and some of the exhaust has looked rusty for awhile. I re-attached pretty much every heat shield at this point too. The joint between the rear muffler and center pipe basically disappeared a week or so back. Rusted right off. I was due for state inspection anyway and had a local shop replace the cat-back. Final bill was about $550. Kind of a tough pill to swallow given I could have ordered all the parts for half that, but being winter, 2ft of snow on the ground, I couldn't bring myself to do it.