Eibach Pro-Kit Lowering Springs — BMW 1 Series M135i / M140i (F21)
The Pro-Kit is Eibach's best-selling lowering spring — it drops the centre of gravity, tightens up body control and fills the arches properly, without the compromises that come with a full coilover kit. It's tested to work with the factory dampers, so there's no need to change shocks alongside it.
Technical specification
Lowering (M 135 i, M 140 i): 25 mm front / 15 mm rear
Lowering (M 135 i xDrive, M 140 i xDrive): 15 mm front / 15 mm rear