Three championships in one season is hard enough. Explaining how you got there is the part most teams skip. Today, Cadillac Racing’s Program Manager Keely Bosn walked through the technical and organizational decisions behind the 2026 IMSA GTP sweep: the Manufacturer title for Cadillac, the Team title for the No. 31 Whelen Action Express entry, and the Driver crown for Jack Aitken.
The on-track story started with the car. Cadillac introduced a comprehensive aerodynamic and braking update package on the V-Series.R ahead of the 2026 season, and Bosn says Daytona validated it immediately. “At Daytona, we hit the ground running and the update really proved itself,” she says. “The drivers all spoke very positively about the changes we’ve made.” The goal was a more drivable aero package, not necessarily more raw downforce, and the results bore that out: the No. 31 accumulated 11 podiums from nine races, including wins at Detroit and Watkins Glen. Wayne Taylor Racing added a breakthrough V-Series.R victory at Road America with the No. 10.
The organizational story is more interesting, because it started a year earlier. In 2025, Cadillac Racing formalized what it calls the “One Team” approach, pulling Action Express and Wayne Taylor Racing on the IMSA side together with Hertz Team JOTA in the World Endurance Championship under shared engineering and race-lead resources. Engineers and race leads attended events across both series. This season, that collaboration moved to the driver roster as well.
Jack Aitken and Earl Bamber ran most of the full IMSA and WEC calendars, with Jordan Taylor, Will Stevens, Louis Delétraz, Filipe Albuquerque, and Ricky Taylor making appearances in both series. The point was transfer of information in both directions. “It’s one thing for us on the technical side to be pushing certain methodologies or setups,” Bosn says. “It’s another thing for that to come from the drivers.” When a driver carries a setup preference or race-strategy insight from a WEC round back to an IMSA team, it moves faster than an engineering memo.
The No. 31 also collected season-wide awards beyond the championship hardware: leading laps, pole positions, a sustainability award, and the fastest pit stop aggregate across the field. That last one is worth noting because time lost in the pits is time that doesn’t require on-track overtaking to recover. For a team chasing points consistency over race wins, pit efficiency is as much a competitive tool as aero balance.
Cadillac’s championship consistency now spans nearly a decade. This marks the program’s fifth IMSA Manufacturer title since 2017 and its 11th overall, a record built on the same principle Bosn describes for 2026: incremental improvements compounded across a unified program. GM’s endurance effort on the IMSA side mirrors what Chevrolet’s Corvette program accomplished in GTD Pro, where consistency rather than outright dominance produced a back-to-back Manufacturer title.
The celebration will be brief. Two WEC rounds remain before the end of 2026, and the 2027 IMSA season opens at Daytona in roughly three months. Cadillac holds the V-Series.R’s development standard through a title-winning year and now has to figure out what to improve next. That, Bosn suggests, is never actually the hard part. “Our development is ongoing,” she says. “It never stops.”
Eleven titles in and the program still hasn’t found a ceiling worth talking about.
Source: Cadillac. Images courtesy of Cadillac.
