BMW F20 F21 118i pro fusion custom made cat back exhaust. Car was non m-sport and bumper was cut for twin exhaust. The exhaust was professionally installed by Profusion and removed by a local garage in a way I'm told that can be installed onto another car.
Was installed on a 2015 facelift F21 118i but has since been reverted back to stock in order to sell the car. Sounds really good with a fruity rumble. I have videos of the sound which I can share before I removed. It is one piece (over 10 foot long) - I've put measurements on pictures.