Fits 2012, 2013, 2014, 2015, 2016, 2017 BMW 4-Series (F32) 2WD ONLY;Average Lower : Front: 1.6 " Rear:1.6";Spring Rate (kg/mm) : Front: 3.1 | Rear: 7.8. Godspeed Project's performance lowering springs are cold wound on coil winding machine with SAE 9254 spring wire material, one of the ideal materials available.