Yeah the full body is for dirt track. Its in the rules you have to run a full body at our track. That pic you posted is from last year. That's my son in 3rd place with his old kart. The kart in 1st is crazy fast! Last year he never lost a race. We had a lot of 2nds!! This year we bought a newer chassis and won the season opener right out of the gate. Chassis made a world of difference. Old one was a 1999 Shadow Storm, our new one is a 2014 Phantom Triton. Night and day difference in handling.