iRacing Development Update - 2025 Season 4
- Chris SIRA

- Sep 15, 2025
- 2 min read
Following on directly from YouTubers first looks at Season 4 - such as Emily Jones at Overtake.gg which SIRA shared recently - iRacing has released the video below, detailing quite the multitude of updates, new content and iRacing-ecosystem updates.
Season 4 highlights include -
New Sim UI
Aston Martin Vantage GT3 EVO
Dallara IL-15 (INDY NXT)
Ford Mustang GT4
Physics Overhaul for the GT4 Class, including Rain Tires updates
BMW M4 GT3 updated to EVO spec
Hybrid System Overhaul
Substantial NASCAR Gen4 Drafting Updates
Autódromo Hermanos Rodríguez (Mexico City)
Rescanned and remodeled tracks: Charlotte Motor Speedway, North Wilkesboro Speedway, Sonoma Raceway, and World Wide Technology Raceway.
Overhauled and modernized tracks: Chicago Street Course, Circuit of the Americas, Daytona International Speedway, Texas Motor Speedway, Watkins Glen International, and Oulton Park Circuit
Texture Compression Update
VR Headset Eye-Tracking Foveated Rendering Support
European Spanish for much of the non-in-Sim iRacing application
All three new cars come ready for rain racing! (Aston Martin Vantage GT3 EVO, Dallara IL-15, Ford Mustang GT4)
AI Racing is now available with FOUR new cars! (Aston Martin Vantage GT3 EVO, Ford Mustang GT4, and the NASCAR Gen4 Class Cars)
AI Racing is now available at North Wilkesboro Speedway, Circuit of the Americas - NASCAR West, and all SEVEN track configurations for the brand new Autódromo Hermanos Rodríguez (Mexico City)! AI Drivers have also been retrained from scratch at Charlotte Motor Speedway - all EIGHT non-Dirt configs, Sonoma Raceway - all NINE non-Dirt configs, and World Wide Technology Raceway (Gateway) - Oval
Hundreds of meticulously engineered new vehicle setups
You can also read about all the updates from the official page here :
Links
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