The Koni Threaded Suspension Kit is a comprehensive street ride adjustable kit. It allows ride height adjustment on all four corners of the car in most cases. The kit also offers rebound dampening adjustment. This allows you to set and adjust the ride height, corner weight the car and tune the ride and handling characteristics. Kits are designed for mild to aggressive street cars but still give a comfortable daily driver ride. These suspension kits were developed and tested on the famed German Autobahn and are all TUV approved.