Win the following races to unlock the following stuff:
Saleen Qualification: Hummer H2
Colossus: Nissan 350Z
Urban Sports Cars: Audi TT
V6 Engine: Sport Tuning Kit Evo 1
Urban Performance Cars: 2005 Corvette C6
Low Displacement Challenge: None
Chevrolet Fighting: Sport Tuning Kit Evo 2
Mythical Elanor: Morgan Aero 8
Under 500 HP: Performance Tuning Kit Evo 1
Over 500 HP: Performance Tuning Kit Evo 2
GT Championship: Nissan Skyline GT-R R34
Gentlemen Drivers: Performance Tuning Kit Evo 2
Sport Racing Cars: Lamborghini Gallardo
V10 Rage: Evo Kit 1
Performance Racing Cars: Ford Cobra Concept
Ultra Race Cars: Lamborghini Murcielago