Seems Cadillac is after some pretty big guns:
The new, up-to-600-horsepower ATS-V.R meets international FIA GT3 specifications, a highly coveted pedigree that allows it to potentially run in more than 30 different GT series around the world. Other marques in this ultra-competitive racing class include Aston Martin, Audi, Bentley, BMW, Ferrari, Lamborghini, McLaren and Porsche. The FIA is the governing body for worldwide motorsport, with the GT3 class representing a specific set of specifications for racing cars based on production models.