Cameron Waters has repeated his Perth success, completing a clean sweep of the NP300 Navara Winton SuperSprint by taking out the final race of the weekend this afternoon.
The Prodrive Racing Australia young gun lead the field from start to finish, winning the 18-lapper by a 9.9secmargin and taking out the round.
"It has been an awesome weekend," Waters said.
"I've topped every session, I'm wordless."
Andrew Jones followed Waters home to take second for the round, ahead of Dumbrell in third.
Chris Pither was fourth,while a slow start saw Jack Le Brocq fall back into the pack after starting from the fourth grid spot.
But the pace of his MW Motorsport Falcon prevailed to see him recover in fifth position.
Rookie Shae Davies was sixth, ahead of Aaren Russell and Matt Stone Racing teammate Todd Hazelwood.
After a disappointing start to the weekend, Simon Evans came home in ninth, while James Golding recovered from his DNF in race two to round out the top ten.
Click here for the full results.
Watersnow leads Dumbrell in series standings by 118points, followed by Le Brocq, Pither and Jones.
The Dunlop Series resumes at the Castrol EDGE Townsville 400, July 10-12.