Successfully complete the indicated task in Arcade mode to unlock the corresponding bonus:

Bandit Chase mode: Earn $40,000 total
Cadillac XLR 2004: Earn $150,000 total
Chevrolet 1967 Corvette Stingray: Earn $80,000 total
Chevrolet Camaro 1969: Earn $40,000 total
Concept WK-10: Stop 100 racers in Cop Chase mode
Dodge Charger 1969: Earn $135,000 total
Dodge Viper GTS-R: Earn $275,000 total
Dodge Viper SRT-10: Earn $250,000 total
Ducati 999R: Earn $190,000 total
Ducati Monster S4R: Earn $100,000 total
Elimination mode: Earn $80,000 total
Grand Prix Racer: Win all Gold trophies in Evolution mode
Hummer H3: Earn $175,000 total
Husqvarna SM610: Earn $15,700 total
Infiniti FX45: Earn $210,000 total
Infiniti G35 Coupe: Earn $50,000 total
Kawasaki VN2000: Earn $30,000 total
Kawasaki ZX-10 R: Earn $315,000 total
Lamborghini Countach 1985: Earn $450,000 total
Lamborghini Gallardo: Earn $375,000 total
Lamborghini LM002: Earn $70,000 total
Lamborghini Miura 1973: Earn $220,000 total
Lamborghini Murcielago: Earn $400,000 total
Lamborghini Murcielago R-GT: Earn $350,000 total
Lamborghini Murcielago Roadster: Earn $420,000 total
Low Ridin' Road Hog: Stop 15 racers in Cop Chase mode
Mercedes-Benz CL65: Earn $300,000 total
Mercedes-Benz CLS Coupe: Earn $110,000 total
Mercedes-Benz SL65: Earn $260,000 total
Mercedes-Benz SLR McLaren: Earn $290,000 total
Nissan 350Z: Earn $90,000 total
Nissan Skyline GTR: Earn $160,000 total
Nitrous Sand Bug: Stop 15 cops in Bandit Chase mode
Prototype 93-WT DD: Earn $650,000 total
Saleen Mustang Coupe: Earn $200,000 total
Saleen S7 Twin Turbo: Earn $330,000 total
Subaru Impreza WRX STi: Earn $120,000 total
T-Fin 609 Speedster: Earn $1,000,000 total
The Collector: Finish first in Elimination mode
Triumph Speed Triple: Earn $60,000 total
TVR Sagaris: Earn $235,000 total