I did a coilover modification to my E61 with self leveling rear suspension. I decided I wanted to keep the self leveling rear so we replaced the front to the coilover and coded the rear to get the height we wanted for the rear to be. The dampers were made by JRZ suspension in Netherlands. I can truly say, I am very pleased with the modification. The car continues to level the rear no matter what I have in there and the dampers made it corner like crazy.