I have an ATR crossflow exhaust. In hindsight, I don't think it was installed well, but I never payed attention to the muffler until I tried to re-install my fuel tank this week. The muffler is probably 30 degrees from vertical, with the lower end hitting the fuel tank and the upper end hitting the rear-end. (It may not have been touching previously, but 2 hangers broke free). The exit pipe on the passenger side winds around and over the inlet.
I think similar systems (RJC) have the muffler vertical, and the exit winds behind the inlet.
Anybody know how it should look? It's installed with band clamps instead of pinch clamps, but it's been on a long time. My guess is it will need some persuasion to come apart. But I would like to get it vertical and off the rear end and fuel tank.