Bryce Fullwood claimed the Dunlop Super2 Series double in Townsville, overcoming Tim Blanchard to take out Race 2.
Having won Saturday's opener and finished third in ARMOR ALL Qualifying for Race 2, Fullwood made a move for the lead at Turn 2 on lap 13.
The MW Motorsport driver held onto the spot for the remaining three laps, as the race was shortened to a one-lap dash to the finish following two Safety Car periods.
With the results, Fullwood claims a perfect 300-point weekend and extends his lead to 133 points ahead of Zane Goddard and a further 322 clear of third-placed Ash Walsh.
Triple Eight's Brenton Grove finished second in the race and fourth for the round, having recorded sixth in the opener.
Supercars enduro regular Blanchard was third in Race 2 and second for the round, recording his first podium finish since Adelaide 2011.
As racing got underway in Townsville, polesitter Jake Kostecki made a slow getaway, leaving the door open for Blanchard, who took the lead early.
Kostecki dropped to seventh, while Fullwood moved into second, ahead of Grove.
There was early trouble for Jordan Boys, who banged wheels with Jack Perkins on the run into Turn 2, which shot Boys into the side of Matt Chahda.
Boys was unable to continue due to the damage, bringing out the Safety Car, which lasted until the start of the sixth lap.
Blanchard continued to lead the field, before a second Safety Car was called on the ninth lap for Chahda, who lost a rear wing on the entry to Turn 1, sending him into the wall backwards.
It put Chahda out of the race with substantial damage, the driver reporting to his team that he had a sore ankle as a result of the shunt.
Once racing resumed at the start of the 13th lap, Fullwood wasted no time, moving past Blanchard at Turn 2 with an assertive move.
Grove's Triple Eight team-mate Kurt Kostecki secured third for the round with fourth in Race 2, crossing the finish line ahead of Tickford Racing's Thomas Randle and MWM’s Zane Goddard.
Adam Marjoram occupied seventh, while Jake Kostecki fell to eighth after a problematic start for a second time this weekend.
Perkins recovered from his incident with Boys to finish ninth, while Eggleston Motorsport's Will Brown rounded out the top 10.
The fourth round of the Dunlop Super2 Series resumes on July 26-28, as part of the Century Batteries Ipswich SuperSprint.