The following vehicles are unlocked upon winning these races.

Car	How to unlock
1995 Subaru Impreza WRX STi	Win the Colin McRae Challenge.
Colin McRae R4 (X-Games)	Win the X-Games Europe.
Dallenbach Special	Win the Trailblazer World Tour.
Ford Escort MKII	Win all X-Games events.
Ford RS200 Evolution	Win the Rally Cross World Tour.
MG Metro 6R4	Win all X-Games events.
Mitsubishi Lancer Evolution X (X-Games)	Win the X-Games Asia.
Mitsubishi Pajero Dakar 1993	Win the Raid World Tour.
Subaru Impreza WRX STi (X-Games)	Win the X-Games America.
Toyota Stadium Truck	Win the Landrush World Tour.