You need to win the 4 GP in expert, with the character and car you preffer. Some tips to make it easier:
- Always start with the GOOD start(nitro in the beginning of the race), by accelerating when the 1 appears on screen.
- Try to save 1 or 2 nitros to the last lap.
- You dont need to win all the races, I recommend you to win at least 2 races to secure the win of the GP, in one of the GP i won 2, and in the others I was 8th and 6th, and I could win the GP instead of the bad results.
- I used the following cars for each GP:
- GP1 ----> Victor ----> Remen
- GP2 ----> Keiko ----> Super F-90
- GP3 ----> Marcus --> Carbon
- GP4 ----> Aston ---> Bulldog
And finally, if you have a bad race, but the first ones were good, dont restart because you will restart all the GP, and not only the last race, I knew it by the bad way :(