Sport Springs give your car a lower, leaner and more aggressive look, while significantly improving handling and cornering capability. Your car reacts more quickly and precisely to steering inputs with the improved transient and turn-in response. You'll appreciate the taughter feel and better looks your car will have.The properties of a performance spring can vary dramatically when attributes such as metal hardness and quality of the steel are considered. The wire used in a spring determines its memory or ability to repeatedly return to the position where the wire was originally bent. It also determines the overall life of the spring. Progressive springs are designed to become stiffer as they are compressed in the spring perch under increased loading. This offers many advantages. First, the progressive rate of the springs insures that you will retain a comfortable ride under nearly all conditions. Second, it allows the spring to rapidly build-up resistance when loaded during competition or sport/street driving. This gives you increased performance only when and where it is needed most, especially important during hard cornering and braking when each corner of the car is loaded differently. This provides for the optimum in precision handling and responsiveness. Third, because the rate is progressive, you experience a very smooth transition from straight-line comfort to high performance cornering under all conditions. This facilitates better car control and faster transit through corners. It's the closest thing to having an automatically adjustable suspension on your car. Our springs are for vehicles that are used on the street for both high performance and daily driving. AUTOTECH springs are designed with the street driving enthusiast in mind. They can give you the performance edge you're looking for, without the large trade-off in driving comfort so common to ordinary lowering springs. Their superior design allows them to be equally suited for the street and for the local autocross or driving school event. You will find, as we have, that the key features that set AUTOTECH springs apart from the rest are superior design, superior materials, and strict quality control. Each set of AUTOTECH springs consists of four CNC cold-wound springs specifically engineered for US models. AUTOTECH springs lower your car 25mm-48mm (1-2 inches) from stock depending on model. Each set is matched to assure you a perfect fit every time. Note: 1975-80 Rabbits and Sciroccos require two of VW upper spring perch #171.412.341A, which can be purchased from Autotech or your local VW Dealer.