The Koni 1125 STR.T Kit 99-05 BMW E46 323i/325i/328i/330i Coupe/Sedan (excl AWD) is a suspension upgrade kit designed to improve the handling and ride quality of BMW E46 3-series vehicles (excluding all-wheel drive models). The kit includes four Koni STR.T shocks and struts, four lowering springs, four bump stops, and four dust boots. The Koni STR.T shocks and struts are designed to provide increased damping for improved handling and ride comfort, while the lowering springs and bump stops provide a lowered stance and improved cornering performance. The kit is easy to install and requires no other modifications.