Skyjacker 4-inch lift coil springs specified for 2017 Ford F-250/F-350 4WD gas models increase ride height and clearance while preserving a comfortable road manners approach. These coil springs reflect Skyjacker’s lift system design, intended to respond to on- and off-road conditions; they are supplied as part of a larger lift solution, so other components are required to complete the installation. A limited lifetime warranty is offered.