oval dirt track car questions

[outlaw355]

Ok I saw a couple of videos on youtube of some UMP and imca bodied rc cars and I was wondering what type of chassis are used to build these racers. Any help would be greatly apreciated

 

[revo_rob_1984]

Losi makes them right out of the box

 

[outlaw355]

I looked on losis page and saw the late models and the sprint car but no ump