Heimgartner and his Brad Jones Racing Camaro were unstoppable in the final two segments of the three-part battle for pole, topping the second segment with a remarkable 1m29.280s before running early in Q3, banking a 1m29.422s.
That would have been good enough for pole, but he went back out for a final run anyway and improved to a 1m29.344s to put the position beyond doubt.
"It's harder that way because you can't screw it up, but the car was awesome," said Heimgartner.
"We made some good tunes in practice. Throughout that session, we managed to get to the last [segment] with two sets [of tyres].
"We've been so close to this throughout the year, been second by a tiny, tiny amount. So to finally get one is a big monkey off our back."
Brodie Kostecki fell eight-hundredths short as he booked his spot on the outside of the front row.
That left him well and truly the best of the drivers currently considered to be in title contention.
Source: Autosport