Cadillac captured the IMSA WeatherTech SportsCar Championship’s GTP Manufacturer, Team, and Driver titles, sealing the series with a clean sweep that highlighted Action Express Racing’s #31 Whelen Cadillac V‑Series.R program.
Cadillac wins every title in a single season
The brand’s fourth GTP title follows 2017, 2021 and 2023, with the 2024 season ending at Petit Le Mans. Although the team did not win the final race, the points tally secured Cadillac’s 11th Manufacturer championship record.
Dominance started on May 19 at Michelin Raceway Road America, where Earl Bamber and Jack Aitken’s performance pushed rivals out of contention and opened the door for Aitken’s solo driver crown.
Earl Bamber: the reliable anchor
Bamber, who missed the Long Beach round due to an FIA WEC commitment, finished fourth in the drivers’ standings. He filled the void left by Frederik Vesti’s brief WEC stints, driving each IndyCar round with a clear focus on team endurance.
- Consistent timer – Ensured every stint met the team’s high standards.
- Team leader – Balanced the schedule against the belt‑tight demands of the series.
- Quoted: “Every lap you’re carrying the weight—make it count for the team.”
Jack Aitken’s first GTP crown
With Bamber absent for the season finale, Aitken rolled into the race standing as the sole contender for the driver title. A green‑flag finish at Petit Le Mans sealed his championship, a first for the British driver.
He reflected on the season’s high tone: “The brand and team outlasted the competition, no matter the finish.”
Key moments that defined the campaign
Daytona – The #31 crew gave up the Rolex 24 opening second place to the #7 Porsche Penske Motorsport 963, a loss of a Rolex award but a vital lesson in racing intensity.
Le Mans – Bamber, Aitken and Sebastien Bourdais led 178 laps before a power‑steering failure denied a premier win. The incident fuels a promise: “We want that first Le Mans victory,” Bamber stated.
Strategic outlook for the future
Bamber acknowledged the rider‑drop debate: consistency outweighs single race wins. “Championships require measured attacks over a season,” he said.
Looking forward, the team aims to convert the season’s momentum into a Le Mans triumph and to further cement their role on the global stage, with the next six races offering fresh tactics for both drivers and manufacturers alike.

