Unlock the following cars by placing first in the corresponding Proven Ground Series races:

LEVEL - SERIES
1969 Chevrolet Camaro Z28 - North American Open
1970 Porsche 914/6 - European Open
1985 Toyota AE86 Sprinter Trueno - Asian Open
1992 Lancia Delta Integrale EVO - RWD Shootout
1994 Honda Do-Luck NSX - Flyweight Invitational
1995 Toyota Border MR2 Turbo T-bar - Mid-Engine Challenge
2001 Mazda Mazdaspeed Roadster - FWD Shootout
2003 Renault Sport Clio V6 RS - Hot Hatch Runoff
2004 Honda Wings West Civic Si - AWD Shootout
2007 Shelby GT500 - Heavyweight Open