Yes, for the new GT it needs to be the wider trailer they make (fenders mostly inboard of the walls). I still have my old Montrose trailer which was built for a Porsche GT3, it has the sidewalls inboard of the fenders. I modified it to fit the 05/06 but it was too narrow for the new GT. Montrose Trailers are pretty much all built to spec and the GT is a very wide car with unique dimension requirements for the doors, approach angles and tie downs. I would be wary of buying one not built specifically for the new GT, that’s why I had them build my second. If you talk to Gary over there, he could probably explain a little more in detail as he just built mine last summer. Let me know if you need any other info.