Maranello Motorsport Managing Director, Mark Coffey is impressed with the speed that the Ferrari has shown straight away.
"The 458 is a great car," he said, "it's worth the wait and really is amazing how the time we spent at the factory with Michelotto has paid off with the car so quick and stable so quickly.
"It's terrific to not need months to dial it in. There'd been a lot of people with stopwatches around the track and to now have confirmation of the new record during the team's first test is very exciting so we're looking forward to the racing."
Simonson, who had already driven a 458 during his international commitments, was joined by Maranello endurance driver Peter Edwards, who also posted fast times during the test.
"This car is damn fast!" said Simonson. "Given this is our first test, it's certainly nice to break the lap record finally and we did it in style.
"From the first laps at Bathurst the car was very quick, given it has a great setup baseline from running in Europe this year so we knew we'd be able to work from where they'd left off.
"The power and the chassis are so complementary and I'm feeling really comfortable in the car and with the team.
"These new generation cars are all going to have a fast pace, and there's no doubt the (Bathurst) 12 Hour is going to be very fast and incredibly competitive - it's an event I'm definitely looking forward to on the calendar."