From the showroom to the speedway, the IMSA Michelin Pilot Challenge is IMSA’s showcase for the latest in American-made and imported high-performance sports cars, coupes, hatchbacks and sedans. This series is home to the same cars seen on streets and highways around the world and offers racing in two classes – Grand Sport (GS) and Touring Car (TCR) – running a 10-race schedule in tandem with most of the WeatherTech Championship events.

The Whelen Mazda MX-5 Cup presented by Michelin is the signature spec series for Mazda Motorsports. The MX-5 Cup champion earns a $250,000 scholarship at season’s end. MX-5 Cup has been sanctioned by IMSA since 2021. Each of the series’ seven event weekends – run as a companion to either WeatherTech Championship or IndyCar events – features a pair of 45-minute races.

The IMSA VP Racing SportsCar Challenge is a multi-class sprint racing series. The lead class, P3, features entry-level, closed-cockpit prototype cars, while the production-based GSX class utilizes cars built to international GT4 technical regulations. New in 2025 is the GTDX class which uses homologated FIA GT3 specification car models that participated in the 2024 IMSA WeatherTech SportsCar Championship.