Optimum grip and enhanced lane stability in day to day and extreme situations High gas pressure and a longer service life even when pulling trailers or driving off-road Enhanced safety No spring change required (Use of OE spring possible) BILSTEIN monotube gas-pressure technology; Individually fine-tuned in the BILSTEIN road test; Digressive valving instantly reacts to changing road surface conditions for maximum comfort and control on and off-road; Durable vulcanized neoprene rubber bushings