Apparently its a CAT engine and it bulges out at 515hp. I was looking at a 580r this week, clean grain elevator is much bigger, as is the rear axle, cab and hopper. Hopper still folds down, but when its out it looks like a hopper topper. It unloads faster as well, I think maybe 3.3bu_sec or something like that. Single point hook-up on the header, but the headers haven't changed yet, for this year they are having to plumb in the old style hook-up. The cleaning system has been re-designed, I guess they are saying the 580r will out do the 480 by 10-15% even though it runs on the narrower 470 body, the cleaning system overhaul allows them to achieve this. A few 580s have been sold up here already, 590s won't be available until next fall. The chopper looks like the new MAV chopper without the chaff spreading option ie. they are still running twin spreaders. Air filter has been plumbed further back. Thats all I can remember.