Enter any of the following codes at the DNA lab to unlock a challenge. Then, win that challenge to unlock the corresponding cars at the DNA lab:
CAR - CHEAT CODE
Ascari KZ1 - KNOX
Audi TT 1.8L Quattro - YTHZ
BMW Z4 Roadster - GVDL
Frito-Lay Infiniti G35 - MNCH
Holden Monaro - RBSG
Hyundai Coupe 2.7L V6 - BSLU
Infiniti G35 - MRHC
Infiniti G35 (red design) - MNCH
Koenigsegg CCX - KDTR
Mitsubishi Prototype X - DOPX
Nissan 350Z - PRGN
Nissan Skyline R34 GT-R - JWRS
Saleen S7 - WIKF
Seat Leon Cupra R - FAMQ
Unlock the following cars by defeating the corresponding celebrities in all 3 of his race challenges:
CAR - CELEBRITY
Audi 1.8T Quattro - Beat caballero in all 3 of his race challenges.
Dodge Viper SRT-10 - Beat samuel hubinette in all 3 of his race challenges.
Ford Mustang Fastback - Beat djibril cisse in all 3 of his race challenges.
Ford Mustang GT '05 - Beat smudo in all 3 of his race challenges.
Nissan Silvia S15 Spec-R - Beat phil morrison in all 3 of his race challenges.
Nissan Skyline R32 GTS-t Type M - Beat tarzan yamada in all 3 of his race challenges.
Toyota Corolla GT-S - Beat beau yates in all 3 of his race challenges.
The Mazda RX-8 is the fastest in stock.
To easily earn money, go to World Class League and spectate Air Trauma. Bet on Crystal, who's odds are 20:1. At the very beginning of the race, cheer(R1) for Crystal to give her a full nitrous bar. Boo(L1) any cars that are in front of her and have gained nitrous. Continue to do this until she has passed everyone.
Last Man Standing challenge tip:
Get in last place and spook each car one at a time. It may take more than one attempt, but when done successfully the car will spin out and hit the wall, eliminating it from the race.
Pink Slip Drift challenge:
Use the Nissan Silvia in "Manual Gear Transmission". Normally by default gear is third gear. When the challenge starts, accelerate. When you reach the cornering part, use the hand brake and shift to first gear.
Easy drift points:
To easily earn drift points, hold CIRCLE + X. While those buttons are held, swing your car left and right on the more straight parts of the track to keep the drift going. If you start losing too much speed, release CIRCLE and press X firmly to get some speed. Keep the car from the walls. Once you get your speed back, hold CIRCLE and complete your drifting.