You may have to do some grinding. The only experience I have with a Smittybilt product is with the SRC side armor: passenger side went on with minimal grinding; driver's side I had to grind several times with a Dremel, and a couple of times on a fat weld with my angle grinder. Install took all day (including rustproofing/painting ground areas).
Nevertheless, now that I've reconfigured them for reality, they work fine, and I like em.
There are a few threads on the forum about similar problems with the XRC bumpers, I believe.