Three V8 ute drivers have been taken to hospital after the second crash in as many days at the Adelaide 500.
The accident happened about 11:45am ACDT.
Twenty-one-year-old Matt Kingsley from Queensland is in a critical condition.
Craig Dontas and former rugby league player Jack Elsegood are in a stable condition and are expected to be released from hospital today.
Meanwhile 27-year-old Supercar driver Ashley Cooper remains on life support in the Royal Adelaide Hospital after a crash yesterday morning.