After some reflection, I finally will order the Bilstein B8 damper in order to have the B12 kit. That won't destroy my actual dampers and I will have a better ride than the Performance chassis
In addition, I have the parameters to apply to the car to have the same geometry parameters as the BMW Perf' suspension
What do you guy think about that and about my decision ?
2010 e82 120d : TiAg
/Blk, M Sport package, Stage 1 chiptuning 222hp 345lb/ft, CDV, BMC airfilter, VMR vb3
BMW Performance : strut brace, pedals, gear konb and emergency brake, side skirts, spoiler, diffuser, exhaust ... I know, I have quite all the Perf' stuff