The Eibach Sportline Lowering Spring Kit enhances BMW 3-Series performance with an aggressive stance. Crafted from high-tensile steel, this set of four springs lowers the sedan by ~1.8 inches, improving cornering and aesthetics. Designed for 3-Series models, it offers progressive rates for a track-ready ride. Installation requires compatible shocks and alignment. Powder-coated for durability, it includes a limited lifetime manufacturer warranty.