The Koni 1125 STR.T Kit 02-08 Audi A4 Quattro 4cyl Sedan is an adjustable suspension kit designed to improve the overall performance and ride quality of your vehicle. This kit includes four Koni STR.T shocks, four sport springs, and four bump stops. The Koni shocks feature Koni's patented Frequency Selective Damping (FSD) technology, which allows for adjustable damping to match the driving conditions. The sport springs lower your vehicle's center of gravity, which improves handling and stability. The bump stops provide a softer, more comfortable ride while still providing the necessary support for the suspension. This kit is perfect for those looking to upgrade their suspension without breaking the bank.