RED Bull Racing produced a clean sweep on the second day of the Chill Perth 360 at Barbagallo Raceway on Sunday, with Jamie Whincup taking out both races.
Teammate Craig Lowndes finished behind him in that hit-out, after he won the first race on Saturday.
Although Whincup started from first on the grid for the final race, he found himself in the sand after some coolant was dropped onto the track.
Mark Winterbottom, who was running in second, was also caught out by the fluid.
He didn't manage to recover and finished 12th.
Jason Bright came in third, and while his Team BOC Commodore fell off the pace towards the end of the race, it was a good effort to recover from qualifying 12th.
Earlier yesterday, Whincup declared he had his mojo back, winning the chequered flag by a margin of 0.75 seconds ahead of Bright and Winterbottom, at the conclusion of race two.
Whincup, who started from fifth on the grid, pitted for new tyres on lap 18 of the 42-lap battle, and that proved to be the difference on the hard-wearing 2.42km circuit.
Western Australian racer Dean Fiore tried to go the whole race without changing tyres, and it looked like he may have been on track for his best result at his home track.
But he was swallowed in the last laps of the race, eventually coming 13th.
Bright did a good job to recover from a horror start when he wasted his pole position and dropped back to fourth at the first turn.
For the second half of the 100km race, Whincup and Winterbottom were battling at the front and anticipation was building that more bumping and barging was imminent.
The pair has engaged in a war of words over the past few weeks since a series of sideswipes at the previous event in Auckland last month.
But Bright ruined the head-to-head battle when he touched side mirrors with Winterbottom at 260km/h.
That was just before the final turn, and he went on to pass the Ford Performance Racing star at the death.