The Koni 1145 Sport Kit 02-08 Audi A4 Quattro 4cyl Sedan is an adjustable suspension kit designed to improve the handling of the A4 Quattro 4cyl Sedan. The kit includes four Koni Sport dampers, four progressive rate springs, four bump stops, four dust boots, and four top mounts. The dampers are adjustable, allowing for fine-tuning of the suspension to suit the driver's preferences. The progressive rate springs provide a comfortable yet sporty ride, while the bump stops help to reduce body roll and improve cornering performance. The dust boots protect the dampers from dirt and debris, and the top mounts ensure a secure fitment. This kit is designed to provide a sporty and responsive ride, giving the driver more control and confidence on the road.