Speedmaster coil springs are designed to restore your vehicle's handling by returning ride height and body sway to original performance levels. These coil springs provide you with a comfortable ride and performance that is guaranteed to be within five percent of their advertised rate. Each coil spring is made from high-quality chrome silicone steel that is wound, shot peened, then powder coated to exact specifications to assure the proper ride height, then powder-coated or plated for good looks and long-term durability.