The IMSA SportsCar Championship concluded 2025 with the official pre-season test at Daytona, marking the beginning of the 2026 season. The four LMDh manufacturers – Porsche, BMW, Cadillac, and Acura – showcased updates to their GTP machinery at Daytona International Speedway. Cadillac made significant changes, including a redesigned rear wing and a new braking system. Each manufacturer has a limited number of Evo Jokers for modifications until 2027, with additional tokens available for extended homologation.
Young NASCAR driver Connor Zilisch made headlines by testing the Action Express Cadillac #31 at Daytona and is a potential fourth driver for the team. BMW revealed the M Hybrid V8 with updated bodywork to enhance drivability. Porsche focused on aerodynamic updates for its Penske entries, utilizing several Evo Jokers for improvements.
Acura introduced subtle aerodynamic updates on the ARX-06, while AJ Allmendinger returned as the fourth driver at Daytona after a hiatus. These changes were facilitated by the shared Windshear wind tunnel for IMSA and WEC homologation work. The Aston Martin Valkyrie LMH faced test issues, highlighting the challenges of constant development in sports car racing.
