Race #4 “Rival Sisters” (B and C Class Restriction Race, Rank Expert) Rules: - The Following C Class Cars, with any level of tuning upgrades and conversions, are allowed for this race challenge: •    Alfa Romeo 8C Spyder •    Chevrolet Corvette C6 Grand Sport Convertible •    Honda Spoon S2000 [Converted from Honda S2000 Type-V] •    Mercedes-Benz SL 65 AMG •    Ruf RK Spyder •    Shelby Series 1 •    Spyker C8 Spyder [Converted from Spyker C8 Laviolette] •    TVR Tusca