Street Supremacy Cheats 

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Completion bonus:
After completing the game you can save data and continue a new game with all your data from the first game. Handling is better in the continued game.

Getting easy money:
Once you become the leader of your team, challenge another team. Make all your teammates the lowest ranking drivers. Once they all lose, you will get a chance to race and win up to $10,000 per race. There are five races, allowing you to win up to $50,000 per team race.
User Cheat by hipsdontlie

Street Supremacy Offical Website

Street Supremacy Review - GamePro

Street Supremacy Review - Gamezilla