The Koni 1145 Sport Kit 99-05 Volkswagen Jetta IV 4 cyl Gas & TDI (excl wagon) is a suspension upgrade kit designed to improve the performance of your Volkswagen Jetta IV. The kit includes Koni Sport dampers, Koni Sport lowering springs, and Koni Sport bump stops. The dampers are designed to provide improved handling and stability, while the lowering springs and bump stops provide a lower center of gravity for improved cornering and handling. The kit is designed to fit all 1999-2005 Volkswagen Jetta IV 4 cyl Gas & TDI (excluding wagon) models.