Enhance your towing experience in your 99-04 Ford F-250/350 4WD with the SuperSprings Front Solo SumoSprings. The SumoSprings Solo feature a 1000lb capacity and 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. They are manufactured from proprietary closed micro-cellular urethane providing a smooth and progressive spring rate with superior damping properties.