I own a 2011, no urea on those models. Smarty does not have anything for us yet but I suspect it will be forthcoming considering the marketability. H&S has a good unit from what I've heard from others. I had a 2007.5 but problems forced me to buy the 2011. Looked at all of the options before I bought on line. Woodhouse Dodge in Nebraska had the best deal, almost 11,000 off sticker all done over the phone. Poor fuel milage out of the box. I'm going to put deletes in this winter. Trans works good but may be questionable when faced with the additional horse power.