The ST 2017+ Audi A5 (B9) Sportback Quattro XA Height & Rebound Adjustable Coilover Kit 1.4in-2.4in is a suspension system designed to improve the handling and performance of your vehicle. This kit includes adjustable coilovers that allow you to customize the height and rebound of your vehicle from 1.4in to 2.4in. The kit also includes all necessary hardware and instructions to make installation easy. This kit is designed to improve the performance of your vehicle and provide a more comfortable ride.