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 1400 lb front capacity at 50% compression and 1500 lb rear capacity at 50% compression Stay in Control: It reduces and stabilizes sway so your ride will be at ease; it improves overall driver control and ride comfort; 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 2005-2015 Tacoma 4WD, 2016-2022 Tacoma Prerunner 2WD, 2000-2021 Tundra 2WD 4WD, 2005-2015 Hilux 2WD 4WD and 2005-2015 Hilux Vigo 2WD 4WD; NOTES: Use on trucks with rear leaf springs only; will not work on TRD Pro SumoSprings(R) are a patented suspension product designed to enhance load carrying ability, stabilize sway, and improve overall driver control and ride comfort. They are maintenance free, do not leak air, and do not require airlines or compressors. 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 with superior damping properties. It compress up to 80 pct original height with full memory rebound and one pc. on one side as replacement/upgrade to fact. bump stops. It has a progressive spring rate. The springs are custom designed to fit your vehicle, and they install easily. SumoSprings are a maintenance-free suspension enhancement built to create a better journey. Never load any vehicle beyond the manufacturers GVWR. For more than 20 years, SuperSprings International, Inc. has designed, developed, patented, and manufactured numerous innovative suspension solutions. 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.