The dampers included in the Boss Ultimate kit are not tall enough to handle the 4" of height provided by this system, unfortunately. This kit will technically fit on a 2014 F150, however, Rancho does not currently have front struts that fit the 2014 trucks. You would need to order this kit without dampers, purchase Rancho's 4" Strut Spacer separately (the spacers would allow you to keep your Boss Coilovers, however), and then source rear shocks meant for a 4" lift kit. Your best bet would be to call us directly at 1-877-578-2433, so we could figure out a package.