Chaz Mostert wins 2025 Supercars Championship

After more than a decade in Supercars, Chaz Mostert is finally a series champion. Although he’s won the Bathurst 1000 twice, a Supercars Championship has eluded the 33-year-old Queenslander until now. Mostert’s first drivers’ championship was also the first to be determined by the ‘Finals Series’ that was introduced this year.

The finals format delivered the drama and tension expected, with four drivers in championship contention ahead of the ‘bp Adelaide Grand Final’ in November. Coming into this 13th and final round of the 2025 season, Triple Eight Race Engineering’s Broc Feeney was leading the championship on 5,050 points, with Walkinshaw Andretti United’s (WAU) Mostert on 5,030. Feeney’s teammate Will Brown was on 5,015 points, and Grove Racing’s Kai Allen on 5,000 points.

With three races for the round – one 100km sprint on Friday, 28 November, and 250km races on Saturday, 29 and Sunday, 30 November, the early advantage went to Feeney, who secured pole for Friday’s sprint. In the rain affected and red flagged sprint, Dick Johnson Racing’s Brodie Kostecki won ahead of Mostert and his WAU teammate, Ryan Wood. Feeney finished fourth, with Allen fifth and Brown ninth. Those results cut Feeney’s championship lead over Mostert to just 13 points ahead of the weekend’s races.

Victory in Saturday’s 250km race went to Feeney, who started from pole, but second for Mostert – from 12th on the grid, with two collisions impacting his race – kept him in championship contention. Wood completed the podium, with Brown and Allen finishing fourth and fifth, respectively. That reset the leaderboard to 5,214 points for Feeney, with Mostert 23 points behind on 5,191. Brown and Allen were adrift of Feeney by 76 and 88 points respectively, but even with 125 points for the final race winner, this pair needed a miracle to take the championship.

For Mostert, the equation ahead of the final race required him to win and Feeney to finish fourth or worse. If Feeney finished third or better, he would be champion, regardless of Mostert’s finishing position.

The final day of the 2025 Repco Supercars Championship started with Wood taking provisional pole ahead of the Top Ten Shootout, where Feeney secured pole – his 19th of the season – ahead of Grove Racing’s Matt Payne. Wood qualified third and Mostert fourth. Brown and Allen would start from eighth and ninth.

While Payne got the holeshot, Wood was harassing Feeney and would turn him around on the opening lap. With Mostert in fourth and Feeney back in 21st after rejoining the field, this instantly changed the championship picture. Wood copped a 15-second penalty for the contact with Feeney, who had to spend the remainder of the 78-lap race trying to make up positions.

A slow pit stop on lap 31 undid Feeney’s gains to that point, dropping him to 16th, with an engine issue soon after robbing him of top speed. Meanwhile, Payne was leading from Mostert, with Brown and Allen in fourth and fifth. Despite Feeney’s best efforts to drive around the problem, he couldn’t cut the margin to those ahead. In fact, he would fall back to 20th in the final laps. For Mostert, that meant even if he dropped outside the Top 10, he would still be champion.

Payne won the race, while second for Mostert ahead of Brown and Allen was more than enough to secure the championship. The final points tally was 5,306 for Mostert, 5,244 for Feeney, 5,240 for Brown and 5,223 for Allen.

“I can’t believe it,” Mostert said on the podium at Adelaide. “I’ve been racing for so many years, and I’ve always believed I could do it, but thank god for the finals series!”

The inequalities of the finals format – Feeney won 14 races and Mostert just 4 – will continue to be debated, but it doesn’t change the fact that Mostert is the 2025 Repco Supercars Champion.

Mostert’s first ever title win (after a previous best of third in 2021, 2022 and 2024) was also the first drivers’ championship for WAU since Garth Tander’s win, under HSV Dealer Team colours, in 2007. It’s also WAU’s last with Ford, as the team is switching to the Toyota GR Supra in 2026.