SuperSprings SSC-21 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.• 3900-lb. capacityApplicationsDodge Ram 2500 (2003-2010)Dodge Ram 3500 (2003-2009)Ram 2500 (2011-2014)Ram 3500 (2011-2014) Replacement for original equipment coil springs 3900-lb. capacity | SuperSprings SSC-21 SuperCoils, Pair