Autocar recently caught what looks to be a M4 race car destined for the GT4 category of worldwide sports car racing. In a rare for of racing imitating a street car, the GT4 prototype looks much like the M4 GTS with a couple notable additions. First and foremost BMW has upped the underbody aero dropping the side skirts and adding a real defuser all while dropping the entire car considerably.

There’s a chance that the GT4 could even spawn an ultra limited edition street model based on many of the underpinnings from the GTS.

Look for the GT4 race car to be announced this fall with racing beginning in 2017 worldwide.