The iRacing 2025 Season 4 build is officially HERE! Featuring three new cars, a new track with seven different layouts, an all-new UI within the sim, and plenty of rescanned and updated cars and tracks, our newest deployment has plenty for iRacers to be excited about.

Here’s a look at just some of the new content and features in this season’s release:

• New Sim UI: Our interface once you hit the track has been completely overhauled, with a refreshed design and numerous functional evolutions.
• Autodromo Hermanos Rodriguez: Our first Mexican circuit comes with seven unique configurations, all of which are AI-enabled!
• Dallara IL-15: The INDY NXT car marks the final step on the INDYCAR ladder before hitting the big time. It also deploys rain-ready!
• Aston Martin Vantage GT3 EVO: Aston Martin’s latest GT3 contender adds to one of the world’s most popular racing divisions, and deploys ready for both rain and AI racing.
• Ford Mustang GT4: Our newest GT4 addition brings the Mustang to another racing division, and it too is ready to race in both the rain and AI racing.
• BMW M4 GT3 EVO: The EVO version of the M4 GT3, featuring chassis and aerodynamic overhauls, overwrites the previous version of the car for all users.
• NASCAR Refresh: Rescans of Charlotte, North Wilkesboro, Sonoma, and World Wide Technology Raceway are joined by art overhauls at Daytona, Chicago, COTA, Texas, and Watkins Glen.
• Oulton Park: One of our most popular base package tracks has received an art overhaul as well.
• Physics Updates: The GT4 class, the Gen 4 drafting model, and our hybrid system have received substantial updates for this release.
• Cosworth Pi Toolbox: Use the same telemetry tools that the pros use, as Cosworth Pi Toolbox is offered free to all iRacing users!
• AI Racing: Alongside the AI-enabled new content, we’ve added the Gen 4 Monte Carlo and Taurus, North Wilkesboro, Circuit of the Americas – NASCAR West, and more than 300 new opponent paint scheme options.

Click here to read the full release notes on the iRacing forums!