SuperSprings SSC-37 SuperCoils are heavy-duty replacement coil springs, designed to remedy sagging and overworked original equipment front and rear suspension coil springs. SuperCoils have a linear/constant spring rate consistent with other coil springs. SuperCoils replace original equipment, different from SuperSprings or SumoSprings that work in conjunction with and enhance original equipment.• 5000-lb. capacityApplicationsFord F-450 (2005-2016)Ford F-550 (2005-2016) Replacement for original equipment coil springs 5000-lb. capacity | Supersprings International Inc SuperSprings SSC-37 SuperCoils, Pair