Bilstein B12 (Pro-Kit) suspension kits are a complete set of B8 Performance Plus dampers paired with Eibach (Pro-Kit) springs that provide moderate lowering between 24-40mm (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 (Pro-Kit) suspension kits provide the perfect combination of suspension dynamics, quality and aesthetics. Installation Instructions Installation Instructions Warranty Material Safety Data Sheet Warranty Material Safety Data Sheet Material Safety Data Sheet Warranty