Looking at this site and plugging in the part # the F11 and F07 share rear sway bars.
http://www.bmwstore.pl/pl/katalog/pr...ni-z-pod-gumow
Someone mentioned that the F11 M550dx is also 18mm but that doesn't seem like it would work since the F07 bar doesn't.
Joe - Would you think the F07 bar would work even if you bought F07 swing arms?
For us Xi guys with EDC the F10 M550dx might not be worth the trouble because according to realoem my stock rear bar is already 15mm so only 1mm difference if i did this. Argh!
Alan