If i were to get a muffler or an exhaust system for my audi a6, would i have to get a new rear bumper?

In my a6, the mufflers point down, making them unable to see bc they are behind the bumper. Would i have to get a new bumper to make them fit or is there something i can do with my bumper?If i were to get a muffler or an exhaust system for my audi a6, would i have to get a new rear bumper?if you purchase an exhaust system designed for your car you will not have any worries. if not then who ever installs it can cut off any excess pipping or they can even cut holes in your bumper to make them fit. professionally done of course. best bet would be to purchase one designed for that year make and model.