GT: BMW unveils new twin-turbo M4 GT4

The wave of new cars built to FIA GT4 specification continues with the unveiling of BMW's brand-new M4.

Announced in July, and built by the BMW Motorsport factory that produces the brand's works vehicles, the GT4 M4 will be eligible to compete in North America in IMSA's Continental Tire Series within the Grand Sport class, and in the Pirelli World Challenge series' GTS category.

Powered by a twin-turbo six-cylinder engine, the M4 GT4 will have Aston Martin V8 Vantages, Ford Mustangs, Porsche Caymans, and other road-based racers to play with in North America and in various international GT series once its testing and development cycle is completed.