Evolve Damptronic Shock Absorbers - BMW 2 Series F87 M2 CS | 3 Series F80 M3 | 4 Series F82 | F83 M4Set of 2 front and 2 rear Damptronic shock absorbers We have developed these dampers in conjunction with Bilstein UK over a period of 2 years. As good as the original Bilstein dampers were, we wanted to tailor them for use with lowering springs. We worked with Bilstein to change the valving to make the Comfort setting even more compliant and the Sport + setting slightly stiffer giving more range of damping given by the electronic modes in the EDC