The Eibach Single Front Spring optimizes Ford F-150 suspension performance. Made from high-strength steel, this spring is designed for F-150 standard, extended, and crew cab models, enhancing handling and stability for street or 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 includes a limited lifetime manufacturer warranty.