Bilstein B4 OE Replacement 15-18 Audi A3 Rear Twintube Strut AssemblyBilstein B4 OE Replacement dampers are specifically engineered to be the best choice for maintaining the original ride quality of your vehicle, while meeting or exceeding OE standards. These dampers are the ideal choice for the driver looking to restore the original performance and handling of their vehicle, with the added benefit of world famous Bilstein quality. Installation Instructions Warranty Material Safety Data Sheet Material Safety Data Sheet