The IMSA VP Racing Sportscar Challenge is a North American auto racing series for LMP3, GT3 (run as the GTDX class), and GT4 (run as the GSX class) vehicles. The series is sanctioned by IMSA and is usually run as support races for the IMSA SportsCar Championship. The series began in 2023 as a replacement for the IMSA Prototype Challenge series.[1]
The IMSA VP Racing Sportscar Challenge retained LMP3 class cars from the Prototype Challenge series, but introduced GT4 cars to allow for multi-class racing.[2] Beginning in 2025, the series introduced a third class, GTDX, open to GT3-specification cars.[3] The series features two 45-minute races per event weekend with no mid-race pit stops or driver changes.[4] The series is designed as a development series for other IMSA series, and as such drivers must have either a silver or bronze categorization from the FIA to participate.[5]
The series is currently sponsored by VP Racing Fuels.
Current season
Bijoy Garg
BMW
