Bilstein B4 OE Replacement (DampTronic) dampers are direct OE replacements for the electronically adjustable dampers found on many European brand vehicles. Bilstein B4 OE Replacement (DampTronic) dampers are specifically engineered to be the best choice for maintaining the original ride quality of your vehicle while meeting or exceeding OE standards. Bilstein B4 OE Replacement (DampTronic) 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.