Working on replacing your factory door speakers with aftermarket ones on Ford F-Series trucks? The American International FSB1501 is a pair of speaker adapters for Ford F-150 trucks, model years 2015 to 2018, and Ford F-250/350 Super Duty trucks, model years 2017 to 2018. These adapters will work with 6 in., 6.5 in., 6.75 in., or 6 x 9 in. speakers.