I got 9,794 with a Chevy Corvette ZR1 LM Race Car '09 and I'm No. 9,288 in the World WooHoo under 10,000. That first section is hard but you have to go kinda fast in 3rd or 4th gear. I got about 2,000 pts in the first section alone and the rest was cake. The last section was about 4,000 pts.
I tried it with my favorite racing drift car, CH tires. 401st 16,435 points. Then I tried the SLS for a little while with different settings without going too crazy like the player in 1st position, didn't like it at all.