Zenjoltis is a 5 mile super speedway with speeds topping almost 250mph in the draft. It is a flat out easy driving track with very aggressive AI and lots of traffic at speed. You will need a good and loose setup with lots of speed and a huge amount of gear. The only thing stopping you from going faster is the game engine. This track is probably the most fun track I have ever driven. Flat out is all that needs to be said.
If you would like to download this track, it can be done from the nascarnet files area.