Successfully complete the indicated task to unlock the corresponding car:
BMW Concept 1 Series tii '07: Win all B Class races. 
Daihatsu OFC-1: Win all C Class races. 
Ferrari F2007: Win all C, B, A, and S Class races. 
Nissan GT-R Proto '05: Win all S Class races. 
Nissan Skyline Coupe Concept '07: Win all A Class races.