It is an LCE header. It was expensive, like $400. Here is a link.
http://www.toyotacatalog.net/M1WebGear/ProductDetails.aspx?PartUniqueID=825F8554-5526-4B98-ACEE-AFD57B01689EI live up in Casper, and we have the Poison Spider ORV park, it is like 200 acres of fun stuff. I also go out to Deer Creek off of Hat Six. Both of those places also have a lot of atv and dirtbike activity, especially Poison Spyder. I used to dirtbike out there (on my kdx) until I siezed a bearing while racing. I still need to rebuild my engine and transmission, but I am out of money. Up on the mountain has some fun stuff too. I also go out to ranches that friends own, during the summer. There is a lot of stuff if you know where to look. Not much rocks though. If living in WY I would suggest getting a forest service map, a ORV map, and a BLM map. They should give a basic understanding of some stuff out there. I would also advise to never go on somebody's land without asking, because more often than not, you will get shot at. It really pisses some people off when they find tresspassers, and I would be super pissed too if I found someone on my land without permition. As for Cheyenne, I know of nothing down there, so good luck.