SSA24.5 | SuperSprings for Chev.|GMC Silv.|Sierra 3500, Expr.|Sav. 4500, RAM 2500|3500|4500|5500, Ford F-350, F-450 .5 Part Numbers are sold as individual items Maintenance-free Self-adjusting suspension stabilizing system 2000 (lb) Additional Load-Leveling Ability Reduces body roll up to 30% without compromising ride quality