Gabriel 43173 Rear Spring Assist Load Carrier Shocks Combines shock and spring technology, economical solution for heavier duty use Constant-rate front coil springs can help improve stability and restore or maintain ride height Variable-rate rear coil springs provide 500 lbs. per pair of load capacity [Not to exceed vehicle GVWR (Gross Vehicle Weight Rating). Product does not increase payload] An economical solution for heavier duty use