The two one-hour races, to be run as part of the Shannons Nationals meeting at the Victorian circuit, follow the Pro-Am format seen at Porsche's Rennsport event last year.
“I was pleased to be offered the drive by Shane and am really looking forward to racing the new generation Porsche Carrera Cup car,” said Percat.
“I really enjoyed my time last year in the Porsche Cup and now having driven it, the new model Porsche is very enjoyable to drive but quite different from the old model.
“One thing remains and that is you have to push really hard to get the best out of it”
Percat finished second to Craig Baird in last year's Carrera Cup standings, taking five poles and five race wins.