iRacing GT3 racing: which series to run and the license path

GT3 is the most-driven discipline in iRacing. Series choice matters more than car choice: the same eleven cars run across roughly a dozen series, balanced to within a few tenths of each other.

The eleven cars:

Mercedes-AMG GT3 2020
Ferrari 296 GT3
McLaren 720S GT3 EVO
BMW M4 GT3 EVO
Porsche 911 GT3 R (992)
Audi R8 LMS EVO II
Lamborghini Huracán GT3 EVO
Acura NSX GT3 EVO 22
Aston Martin Vantage GT3 EVO
Chevrolet Corvette Z06 GT3.R
Ford Mustang GT3

New to the Sports Car category? Start with getting started.

Pick by license, then by format

The license is the gate. GT3 series run from Class C up to Class A, and you can’t enter a Class A series until you’ve climbed Rookie → D → C → B.

Class C entry points. Start here once you’ve earned a C:

GT Endurance Series by Simucube: Class C, 60-minute fixed-setup races
IMSA Michelin Pilot Challenge Series: Class C, TCR/GT4 stepping stone into GT racecraft

Class A sprint. Short heats, open setup, run several times a week:

GT Sprint Series by Simucube: Class A, the flagship open-setup sprint
GT3 Challenge Fixed by Fanatec: Class A, fixed setup, runs every 2 hours
iRacing GT3 Regional Tour - Americas: Class A, split by region
iRacing GT3 Regional Tour - Europe: Class A, European time-zone splits
iRacing GT3 Regional Tour - Asia Pacific: Class A, APAC schedule

Endurance. Multi-hour, multiclass rounds on a fixed calendar:

IMSA Endurance Series: Class A, GT3 alongside LMP2/P217 prototypes
Nurburgring Endurance Championship: Class B, GT3 on the 25 km Nordschleife combined
Global Endurance Tour: Class A, mixed GT3/prototype grids

Browse every Sports Car series and its live schedule on the full races index.

Frequently asked questions

What license do I need to race GT3 in iRacing?

Most GT3 series sit at Class A or Class B. The GT Endurance Series and the IMSA Michelin Pilot Challenge run at Class C, so they're the realistic entry point. The GT Sprint Series, GT3 Challenge Fixed, and the iRacing GT3 Regional Tours require a Class A license, which means clearing Rookie, D, C, then B with a 4.0+ Safety Rating first.

What's the difference between GT3 sprint and endurance series?

Sprint series like GT Sprint and the GT3 Regional Tour run short heats: roughly 25-40 minutes, one driver, several races a week. Endurance series like GT Endurance, IMSA Endurance, and the Nürburgring Endurance Championship run multi-hour races on a fixed calendar with optional driver swaps and multiclass traffic.