Solo Werks S1 Coilover System - Audi B8 + B8.5 A4/S4 A5/S5/RS5 Quattro inc. Avant

Designed by a joint engineering staff from Germany and the USA, the S1 coilover is built for the enthusiast thatis looking for an ideal balance of ride quality and performance. In the front the S1 coilover for the B8 Audi A4/S4 Avant system features a specially designed progressive springrate matched to a twin tube low pressure gas damper mounted in a heavy gold zinc platedthreaded coilover housing that provides not only great handling, but also exceptionalcorrosion resistance. The rear features a progressive coil spring and NEW adjustable threadedperch system with a specially tuned sport damper that ismatched to the lowering range of the coil/perch combination.  * depending on vehicle