The Eibach Single Rear Spring enhances BMW X3 suspension performance. Crafted from high-strength steel, this spring is designed for X3 SUVs, providing improved handling and stability for street or light off-road use. Its progressive rate ensures a balanced ride, ideal for daily driving. Requires professional installation with compatible shocks and alignment. Powder-coated for corrosion resistance, it integrates with factory systems. Includes a limited lifetime manufacturer warranty.