GT4 refers to a category of sports car racing that features production-based vehicles. It is part of the broader GT (Grand Touring) racing series, which emphasizes performance and driver skill. GT4 cars are typically modified versions of road-going models, designed to compete in various championships around the world, including the GT4 European Series and the Pirelli GT4 America. The GT4 class is known for its balance of accessibility and competitiveness, making it popular among amateur and professional drivers alike. Cars in this category must adhere to specific regulations regarding weight, power, and safety, ensuring a level playing field while showcasing the capabilities of manufacturers like Porsche, BMW, and Ford.