OEM on road crossbar is not recommendable because it lacks adjustment. This crossbar is limited to a 27in width and does not work well with snowboard racks. Save your money and purchase an after market crossbar from Yakima or Thule.
If true, very disappointing news. Why on earth would you not make this accessory work for BB, OB, BL trim as a reasonably priced after market addition? Poor execution and not disclosed in Ford brochures or on their web site. So no cargo/privacy cover either? Pretty weak Ford.