Right now, we officially know that the Artura Trophy car features increased downforce, a revised exhaust system, an adjustable Bosch engine management system, inboard radiators, and an easily removable rear deck for engine access without removing the rear wing. They can also be converted to meet GT4 racing standards so teams and drivers can race in both categories, making the Artura Trophy a car that can become a stepping stone from GT4 to GT3.
More specifications will come further down the timeline, but the McLaren 570S Trophy cars are also eligible to compete, creating two main categories for the McLaren Trophy, America: The Artura Trophy and the 570S Trophy. Beyond this, each series is split into Amateur (driving as a pair or solo) and Pro-Am (paired drivers only) categories, but regardless of which you qualify for, you need to hold an FIA International C license to compete.