Through the utilization of full threaded bodies and a twin tube damper to control the custom high spring rates, the sprung and unsprung mass of the vehicle is properly controlled to provide greater drivability and confidence when behind the wheel whether you are on the race track or the street. Fits: BMW 6 F06, Gran Coup??, Excl xDrive, Years 13 - 19, Excludes 4 wheel drive. Not for vehicles with electronic damping adjustment.