By recalculating the arch of the leaf spring to provide the appropriate spring rate for lowered travel utilizing the latest manufacturing techniques, Belltech?s leaf springs are designed to easily lower the rear of your leaf spring equipped Sport Truck or SUV by up to 4 inches depending on application. Fits: 04-08 Ford F-150 (All Cabs) 2WD. Lowering: 3?. Application specific. Direct replacement. OEM spring rates. OEM style ?silent block? bushings. E-coated finish. Built to SAE standards. Check the Manufacturer's website for a listing of all vehicles this part can be used with.