Unlockable Cars and Paint Jobs.

Carbon Hydros Custom - Beat all Showtime Road Rules.
Carbon Ikusa GT - Beat all Time Road Rules.
Carson Carbon GT Concept - Find All 400 Smashes.
Carson Fastback - Get a B Class License.
Carson GT Concept - Get a Burnout Driving License.
Gold Paint Finish - Win all Elite License Events.
Hunter Mesquite - Get a D Class License.
Jansen Carbon X12 - Land All 50 Superjumps.
Krieger Carbon Uberschall 8 - Complete 2 Sets of Online Challenges.
Montgomery Carbon Hawker - Hit All 120 Billboards.
Nakamura SI-7 - Get a C Class License.
Rossolini Tempesta - Get an A Class License.
Watson 25 V16 Revenge Racer - Complete all Road Rage Events.
Platinum Paint Finish - 101% Completion (All Events Completed;
All Roads Ruled; All Discoveries, Car 
Parks and Drive-Thrus Found; Two sets 
of Online Challenges Completed).