This game is titled Street Supremacy in North America and Europe, and Shutokou Battle in Japan.
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.
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.
Strategy guides from GameFAQs