Unlock the following cars by completing the corresponding events in the Challenge Series:
CAR - HOW TO UNLOCK Aston Martin DB9 (Exotic) - Defeat Wolf in Boss Battle mode. Dodge Charger RT Classic (Muscle) - Defeat the 21st Muscle Car Gang. Jaguar XK 2007 (Exotic) - Complete all three Turf War races. Mazda RX7 (Tuner) - Defeat Kenji in Boss Battle mode. Nissan 240SX (Tuner) - Complete all three Checkpoint challenges.