Eibach developed Pro-Dampers specifically to compliment the unique characteristics of Eibach Pro-Kit springs, taking full advantage of the increased spring rate and lower center of gravity. The result is enhanced performance throughout the entire working range of the suspension. Your OEM shocks just cannot match the quality, and when lowered will not match their longevity either. Eibach engineers tuned Pro-Damper damping characteristics to achieve maximum performance, but without excessive stiffness or ride harshness. This precise tuning takes time and suspension expertise - a commitment Eibach undertakes to produce a damper worthy of the Eibach name.