Unlock Ascari KZ1:
To unlock the Ascari KZ1 in the DNA lab, win the Last Man Standing challenge

Unlockable cars:
To unlock the following cars, enter the corresponding DNA Lab codes and win the specified challenges:

KNOX - Win last man standing challenge to unlock the Ascari KZ1 in the DNA Lab.
JWRS - Win retail challenges to unlock the nissan skyline R34 GT-R in the DNA Lab.
YTHZ - Win special challenge to get the Audi TT 1.8L Quattro in the DNA Lab.
GVDL - Win special challenge to get the BMW Z4.
MNCH - Win special challenge to get the Frito-Lay Infiniti G35 in the DNA Lab.
RBSG - Win special challenge to get the Holden Monaro in the DNA Lab
BSLU - Win special challenge to get the Hyundai Coupe 2.7L V6 in the DNA Lab.
MRHC - Win special challenge to get the Infiniti G35 in the DNA Lab.
KDTR - Win special challenge to get the Koenigsegg CCX.
DOPX - Win special challenge to get the Mitsubishi Prototype X in the DNA Lab.
PRGN - Win Special challenge to get the Nissan 350Z in the DNA Lab.
WIKF - Win special challenge to get the Saleen S7 in the DNA Lab.
FAMQ - Win special challenge to get the Seat Leon Cupra R in the DNA Lab.

Unlockable cars:
Select "Driver DNA Lab" and choose "Celebrity Face Off". Defeat the following drivers in all three of their challenges to unlock the corresponding cars:

Caballero - Audi 1.8T Quattro
Samuel Hubinette - Dodge Viper SRT-10
Djibril Cisse - Ford Mustang Fastback
Smudo - Ford Mustang GT '05
Phil Morrison - Nissan Silvia S15 Spec-R
Type M Tarzan Yamada - Nissan Skyline R32 GTS-t
Beau Yates - Toyota Corolla GT-S