FYI: the 4 door factory rubicon rails will fit the 2 door, with a little trimming. The front 2 mounting tabs are the same distance apart for each, 24 inches on center. I wasn't able to find a definite answer or anyone that had done this before so I figured I would let everyone else know since the 2dr rails are pretty scarce and highly valued whereas the 4dr rails are more readily available and cheaper to come by. I used an angle grinder with a metal cutting disc, put them in place and measured by lining them up with my ACE rails. The end result is approxomately 23 inches cut off the end.