The Rock Krawler 3.5-inch X Factor suspension system for 2017–2022 Ford F-250 and F-350 4x4 trucks is a matched kit specifying coil springs as part of the package. The description indicates component boxes and the hardware needed for the 3.5-inch system and keeps application focused on those model years and four-wheel-drive configurations.
Rock Krawler 2017-2022 Ford F250/F350 4x4 3.5in X Factor Suspension System