What's Included: The kits contain both front and rear sumosprings sold as a pair (left and right) Weight Capacity: SumoSprings will not increase your vehicle's weight-carrying capacity; these springs have a 2600 lb front capacity at 50% compression and 7,000 lb rear capacity at 50% compression Stay in Control: Improves overall driver control, ride comfort, reduces and stabilizes sway to put your ride at ease; say goodbye to jarring bumps on the road, as these springs help to absorb them with ease Easy Maintenance: It is world's only leak proof air spring and it requires no maintenance; handmade from micro-cellular polyurethane and designed to reduce rear-end sag as well as stabilizing weight transfer Vehicle Compatibility: This set fits your 2011-2021 F53 2WD and 2008-2009 F53 2WD; NOTES: 20k-22k Fleetwood, Forest River, Newmar, Thor SumoSprings are a patented suspension product designed to enhance load carrying ability, stabilize sway, and improve overall driver control and comfort. SumoSprings are manufactured in a variety of heights, diameters and densities to support multiple front and rear applications. All SumoSprings are manufactured from proprietary closed microcellular urethane designed to suit numerous applications. SumoSprings Compress up to 80% of original height with full memory rebound and stretch 50% of their height. They are maintenance free, do not leak air, and do not require airlines or compressors. SumoSprings(R) are a patented suspension product designed to enhance load carrying ability, stabilize sway, and improve overall driver control and ride comfort. SumoSprings(R) are manufactured in a variety of heights, diameters and densities to support multiple front and rear applications. They are manufactured from proprietary closed micro-cellular urethane providing a smooth and progressive spring rate. Never load any vehicle beyond the manufacturers GVWR. Proudly made in the U.S.A. With a limited lifetime warranty and a 30-day satisfaction guarantee, you can trust that these springs are built to last and will provide the support and comfort you need for years to come.