![Solo Werks S1 Coilover System - Audi A4/S4 B5 Quattro Solo Werks S1 Coilover System - Audi A4/S4 B5 Quattro](https://cdn11.bigcommerce.com/s-m480ec46ug/images/stencil/500x659/products/119800/330714/s1au004.2__55502.1645041138.1280.1280__48963__66807__67118.1693465171.jpg?c=1)
![](https://cdn11.bigcommerce.com/s-m480ec46ug/images/stencil/500x659/products/119800/330704/s1au004.4__98566.1628923742.1280.1280__60140__19406__03448.1693465169.jpg?c=1)
In the front the S1 coilover for the MK4 VW/Audi Group platform features 400 lb/inch spring
rate matched to a twin tube low pressure gas damper mounted in a heavy gold zinc plated
threaded coilover housing that provides not only great handling, but also exceptional
corrosion resistance.
The rear features a progressive rate coil spring and adjustable threaded perch system with a specially tuned sport damper that is matched to the lowering range of the coil/perch combination.