The factory upper control arms can only handle so much deflection before they start to bind and give your truck some serious headaches. These upper control arms use either boxed or tubular steel designs that are far stronger and beefier than the stock UCA's stamped design, and our selection of performance UCAs come standard with improved bushings and joints for much better performance and range of articulation. Ford F-150 Fitments: 2004, 2005, 2006, 2007, 2008 Ford F150 with 4.6L or 5.4L engines. Submodel Fitments: FX2, FX4, King Ranch, Lariat, STX, XL, XLT. Some Exceptions apply, please see individual product pages for specific fitments.