To maximize your Eibach Pro-Kit spring upgrade, compliment them with top quality Pro-Dampers. The engineers at Eibach developed Pro-Dampers specifically around the unique characteristics of the Eibach Pro-Kit, taking full advantage of the Pro-Kit's increased spring rate and the vehicle's lower center of gravity. The result is enhanced performance throughout the entire working range of the suspension - the " Pro-System". Driving is believing! Until you have driven a car equipped with Eibach Pro-Dampers - you will not believe the transformation in handling and performance - all without sacrificing the ride quality.