Spring is in the air - at least in Sweden
Time to plan for spring upgrade. I can recommend M Performance Klappenshalldämpfer wih two modes - legal / illegal, remote controlled.
All INFO on X4 thread: "Anyone installed M Perf....." incl. youtube clip from Russian X4 with STD and Klappen.
Klappen is made solely for X4 35i M, but should, with a little adaption, fit on a X3 35i M.