Bilstein B16 (DampTronic) 13-15 BMW 335i xDrive Front and Rear Suspension KitBilstein B16 (DampTronic) suspension kits feature ride height adjustability with dampers compatible with OE electronic damping systems. All of the active features of the factory electronic suspension, along with the factory controls, will be retained with the installation of this kit. These kits offer monotube performance dampers with matched springs that are tuned for each specific application. The zinc coated and threaded body design will give you