Are you looking for a ski rack? Or a top box?I just installed at the dealer the Acura rail and side bars on Acura MDX 2014. Now I am discovering that no Thule or Yakahima Boxes to carry skis can fit with back Door hatch. I am looking for a solution? I don’t believe that no boxes on the market can fit properly on an MDX.
If a top box, I believe the consensus is that the Thule Motion XT (L) is the best choice for the factory cross bars. There is a lengthy thread about the factory rails. Skip to page 19 for pictures of the Thule mounted on a 3rd gen MDX.