The Koni 1125 STR.T Kit 06-11 BMW E90 325i/328i/330i Sedan (excl AWD) is a performance suspension upgrade for the 2006-2011 BMW E90 325i/328i/330i Sedan (excluding All Wheel Drive models). This kit includes four Koni STR.T shocks and struts, four Koni Sport lowering springs, four bump stops, four strut mounts, and four dust boots. This kit will improve the handling and ride quality of your BMW while also lowering the ride height for a more aggressive stance. The Koni STR.T shocks and struts provide increased damping for improved handling and steering response, while the Koni Sport lowering springs provide improved suspension geometry and a lower ride height. This kit also comes with bump stops to limit suspension travel and strut mounts to provide a secure mounting point for the shocks and struts.