KW Suspensions F90 M5 with EDC Coilover Kit - Variant 4The KW Variant 4 was developed exclusively for supercars, sports cars and performance oriented sedans. With coilover struts made from stainless steel or aluminum, depending on the vehicle design, you give your super sports car the necessary equipment to further increase the driving dynamics in everyday life. The triple adjustable high performance dampers combine leading race technology to allow the independent adjustment of the rebound and the low