The Koni 1125 STR.T Kit 08-13 BMW 128i/135i Coupe is a suspension kit designed to improve the handling of your BMW 128i or 135i Coupe. This kit includes Koni's STR.T shocks and struts, which are designed to provide improved comfort and control over stock suspension components. The kit also includes progressive rate lowering springs to reduce body roll and improve overall handling. Installation of this kit will result in improved cornering, better steering response, and overall improved driving experience.