Ford's Mark Winterbottom holds a one-point lead in the V8 Supercars championship after winning both of yesterday's 60km races in Perth.
The Prodrive racer, who earlier in the day secured his first pole position in more than a year, dominated the two 25-lap races.
Winterbottom held off team-mate Chaz Mostert to secure his first race win of 2015 in the opening race, and then led from start to finish in the second race to complete a clean sweep. It has been three years since he won consecutive races.
"Awesome day for the team," Winterbottom said. "To get a pole position - it's been about 12 or 14 months - and good to get the wins."
The victories lift the 2013 Bathurst champion from sixth to the lead of the championship by just one point from defending champion Jamie Whincup, who said he was almost "embarrassed" to find himself on the podium after finishing second in the second race.