This is the "Final" race of the game. It's you versus Darius and 6 other racers. I used the Pagani Zonda (not tuned or upgraded at all) and he is driving the Ferrari 599FX (I believe). It's not too hard on Easy or Normal, I have yet to try it on Hard.
The race is a mixed course (both road & dirt) and you will be going so fast that handling is a big part of this race. I picked the Zonda for its mix of handling and speed and beat Darius with room to spare.
Make sure that you utilize the flashback if you make any mistakes or bad turns along the race.
**Spoiler** as long as you have raced and beaten all the other racers, as SOON as this race finishes you will be forced to race Darius and when you beat him there you will also get the Domination!