SuperSprings SSC-31 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. capacity• 5.87" dia. x 16"H• Weight: 56 lbs. ApplicationsFord E-450 Econoline Super Duty 4x2 (1999-2002)Ford E-450 Super Duty 4x2 (2003-2017)Ford F-250 4x2 (1980-1999)Ford F-250 HD 4x2 (1997-1997)Ford F-250 Super Duty 4x2 (1999-2016)Ford F-350 4x2 (1980-1997)Ford F-350 Super Duty 4x2 (1999-2016) Replacement for original equipment coil springs 5000-lb. capacity | SuperSprings SSC-31 SuperCoils, Pair