iRacing announces 2026 Season 4 update with new cars and tracks

iRacing has announced the launch of its 2026 Season 4 update, scheduled to begin on September 15, 2026. The update introduces significant content expansions, including four new vehicles: the Aston Martin Valkyrie AMR-LMH, two Caterham models (Academy and 420R), and the Gen 4 Grand National stock car.

In addition to new vehicles, the platform is expanding its single-player capabilities with enhanced AI racing content. This includes eight AI-enabled cars—such as the Chevrolet Corvette C7 and BMW Z4 GT3—and 19 new track layout unlocks across eight circuits. The update also features reconstructed versions of Road America, Mid-Ohio Sports Car Course, and The Milwaukee Mile, utilizing updated laser scan data and improved physics engines.