The Australasian V8 Supercar Championship is set for one of the most closely contested series in years after testing on the new-look cars for 2013 competition, says series chairman Mark Skaife.
The vehicle bodies and aerodynamic kits of the four manufacturers to line up on the grid have been approved for competition in the expanded championship which sees Nissan and Mercedes join regulars Holden and Ford.
The cars have been approved following six days of testing and evaluation to determine the bodywork and aerodynamic specification of each vehicle.
The sports governing body says all four models now have the closest aerodynamic parity of any makes in the competition's history.
The first round is in Adelaide in March.
