Wisefab Feal Coilover Kit 441 - Heavy 10K/6KBMW E90 Coilover Kit with 10kg Front and 6kg Rear springs (true coilover style). Each shock is designed with Feal Suspension expertise and success in many top level international motorsports and through years of experience tuning various shock brands. Feal Suspension strongly believe that the 441 coilovers have an edge on shock design that gives you confidence and a competitive advantage where needed most.