I am considering buying this kit and therefore I am doing my research. I am confused by the statement below as Birdman also has a 2013 with the thicker frame and thus why did he not run into the same issue?
I have a 2013 frame. The ICON support brackets are form fitting to the frame. If they aren't lined up closely during install it takes some convincing to get the bolt holes lined up, especially if you start tightening any of the nuts before all the holes are lined up. In either event, this kit snugly fits the frame as which is one of the reasons it is one of the better kits out there. The tradeoff is you want to save the beers for another install because this one takes some finesse.
In other words, there is no issue. It just takes patience and pre planning to make sure everything is lined up properly. If it's not, take it apart and try again. If you are the type to rush and shit house parts together then definitely set some extra time aside.
---------- Post added at 07:28 PM ---------- Previous post was at 07:25 PM ----------
Also, the 2013+ frame is the same exact size on the outside. There is additional support inside the frame rail which increases the material thickness, but it doesn't effect the outside dimensions as it pertains to this bump kit install.