“The test days at Phillip Island went really well,” said Stewart, who will drive Car #8 in the third tier of Supercars.
“The track is completely different from anything I have driven on before, so I learned a lot about carrying speed through those big high-speed corners.
“I kept progressing throughout the day and was really happy with that. I still have a lot to learn and I'm confident that I will keep improving throughout the weekend as I get more experience racing the Freightliner Racing Super3 car.
“I'm super excited for my first Kumho Super3 race in a couple of days' time.”
Super3 will commence this Friday with two practice sessions on the opening day of the WD-40 Phillip Island SuperSprint.