The tip cannot be removed easily. It has to be cut off.
I know someone who mounted dual tips (part no.:82 12 0 398 334), instead of the single, oval one and they look pretty good! The old one was cut off, and a Y adaptation needed to be put in place, to be able to mount the dual tips.
BMW 320 dA LCI, BMW PPK - 197HP, 2010, sapphire black, steptronic