I have a question

[ConspX_]

Does someone know why these cars are included in the installation folder of nfsps and are they unlockable in some way?
PORSCHE 911 GT3
PORSCHE 911 GT3 RS
PORSCHE CARRERA GT
KOENIGSEGG CCX
DODGE CHALLENGER 07
ASTON MARTIN DB9
ASTON MARTIN DBR9
SEAT LEON CUPRA
MCLAREN F1
AUDI R8
PLYMOUTH ROADRUNNER
AUDI RS4
HONDA S2000
MERCEDES-BENZ SL65
PONTIAC SOLSTICE GXP
BUGATTI VEYRON
ACURA NSX