Porsche 911 GT3 R (992): The IMSA Flagship Guide
The Porsche 911 GT3 R 992 iRacing is the undisputed king of the 2026 IMSA and GT3 Challenge grids. As Porsche’s premier GT3 weapon, the 992-spec R is a masterclass in endurance racing engineering. Featuring a massive 4.2L flat-six—enlarged from the 4.0L in the previous generation—the GT3 R provides the torque and “punch” needed to…