It's a simple mod. I Retextured the Monster Truck A (That one with the American Flag skin -MONSTERMASH cheat-) in Duke Nukem: Forever style. You can see the Monster Truck in the Debut trailer of the game and on many screenshots.
The mod is unfinished for now, I will finish it very later, when i get final informations of the Monster Truck (I am sure, it got something on the back i can add too).

Enjoy