The 27-year-old Stoner is set to race a Red Bull Holden Commodore backed by Triple Eight Racing, previously driven by four-time Supercars champion Jamie Whincup, the same team he has already enjoyed a series of training and testing sessions with.
Stoner will follow the path of fellow former motorbike world champion Wayne Gardner into the V8 ranks and said he was under no illusions about the challenges he would face.
"The hardest thing I have had to do is change whatever I know about braking and changing through gears," Stoner said. "I am having to rethink again. I have to forget everything I know about bikes and change to learn to drive these."
Stoner's Commodore will wear his famous No27, the same number which which he won the 2007 and 2011 MotoGP championships.
After an injury-interrupted season, Stoner signed off on his MotoGP career in his final race in Valencia, Spain, in November, finishing third in the 2012 championship. He said he had no plans to return to the sport.
"I've got no thoughts whatsoever at this time of ever even thinking of coming back to grand prix racing," he said.
"I'm not changing my mind every couple of minutes. The money doesn't interest me."
Stoner will enjoy his first public outing with his new team in a Supercar test day at Sydney Motorsport Park on February 16.
He will drive the development series which races older cars than the Supercars championship and follows a different schedule with seven races held over seven rounds.
The 2013 series will see Stoner racing in Adelaide, Perth, Townsville, Ipswich, Winton, Bathurst and Sydney.
- nzherald.co.nz/AAP