The Bilstein B12 Audi A4 Avant (8K5) K 2 PK Suspension Kit is an upgrade kit for your Audi A4 Avant (8K5). This kit includes two Bilstein B12 shock absorbers, two progressive rate springs, and two top mounts. The shock absorbers are designed to provide improved handling and a smoother ride. The progressive rate springs are designed to provide a more comfortable ride and improved cornering. The top mounts are designed to provide improved stability and control. This kit is perfect for those looking to upgrade their suspension and improve their driving experience.