Bilstein B12 (Sportline) suspension kits include a complete set of Bilstein Performance dampers paired with Eibach (Sportline) springs that provide extreme lowering between 30-60mm (depending on application). These kits offer dampers and springs that are tuned for each specific application to provide the best fixed height lowering solution. Bilstein B12 (Sportline) suspension kits provide the perfect combination of suspension dynamics quality and aesthetics.