Bilstein B4 OE Replacement (Air) dampers are designed to replace many European brand vehicles' original air suspension systems. Bilstein is an OE supplier for air suspension systems; the quality of these products meets and typically exceeds the standards set forth by the vehicle's manufacturer. Bilstein B4 OE Replacement (Air) dampers are designed to connect directly to the original connectors on the vehicle, ensuring modification-free installation and restoration of the original feel of the vehicle.