The IMSA Michelin Pilot Challenge features sports cars from recognized worldwide manufacturers, consisting of GT4 and TCR homologated vehicles. The Michelin Pilot Challenge has two different classes, Grand Sport (GS) and Touring Car (TCR).

Grand Sport

The Grand Sport class consists for SRO GT4 homologated cars with engines tuned to produce between 400 and 450 horsepower and can run speeds in excess of 160 mph. Competition is equalized by adjustments to fuel-tank capacities, ride height, power and weight. Manufacturers competing in 2025 include Aston Martin, BMW, Ford, McLaren, Mercedes-AMG, Porsche and Toyota.

Touring Car (TCR)

The Touring Car class consists for WSC TCR homologated cars with engines tuned to produce between 300 and 350 horsepower and can run speeds in excess of 140 mph. Competition is equalized by adjustments to fuel-tank capacities, ride height, power and weight. Manufacturers competing in 2025 include Audi, Cupra, Honda and Hyundai.