Flaming River Mustang II flat ground coilover springs are ultra-lightweight springs that are up to 25 percent lighter than similar competitors' springs. Made of high-tensile spring steel, they're then cold-wound, heat-treated, and shot-peened, ground at both ends, and given a chrome finish. Available in a wide variety of rates for your Mustang, grab a set of Flaming River Mustang II flat ground coilover springs for your Pony and give it the suspension it deserves.