[Vehicle Fitment]: Compatible with Ford Expedition 2018-2021, fit for F-150 2015-2020 (King Ranch/Lariat/Platinum/XL/XLT), fit for F-150 2016-2020 (Limited/SSV/Police Responder); Compatible with Lincoln Navigator 2018-2020
[Installation Position]: Front Upper Left and Right, Driver and Passenger Side
[Professional Replacement]: This ball joint is replacement for above model's suspension system, and may help you resolve those problems: ① loose or shaky steering ② strange squeaky and clunky noises from suspension ③ uneven tire wear ④ steering wheel drifting to one side !!!!