You might call the “Super Stock” an unlimited version of the “Farm” appearing tractor classes. Although they may appear “stock” on the outside, this class produces many times over their factory rated horsepower. As the name implies, diesel is the only fuel allowed in the Diesel Super Stock (DSS) division. These machines produce around 2,500 to 3,000 horsepower with their “stock engines” having up to four turbochargers flowing the air mixture. They weigh 8,200 pounds.