Beats me, I saw how they're not tucking, etc. but just saw a truck on CL with them and they're tucked. Guy doesn't say anything about narrowing or swapping the rear and the fenders LOOK stock...
But without more details who knows, might be a swap or narrow job.
Truck seems like a decent deal at 6K though you'd need to finish/redo the bag setup, only bagged in rear and it's BOA.
Richard