All variants of the BMW X4 currently only feature a rear exhaust configuration that places two tailpipes side by side on the left side of the bumper. This includes the current range-topping BMW X4 xDrive35i model. But from this set of spyshots, that fact is about to change.

Seen here is a completely undisguised but unbadged BMW X4 working the Nurburgring. Well, unbadged save for a little M badge on the front fender. The exhaust configuration is what makes it interesting – it has one exhaust pipe on each side of the bumper, which no BMW X4 currently have.

It clearly isn’t a bonafide X4 M, so could this be a more hardcore BMW X4 M40i from Munich’s BMW M Performance Automobile division The xDrive35i model currently has 306 horsepower and 400 Nm of torque, so an M40i variant would have to take the numbers considerably higher than that, but it still has to be lower than the M3/M4’s 431 hp and 550 Nm.

So we’re guessing about 360 hp and 450 Nm would make sense, making the BMW X4 M40i a competitor to the 340 hp, 460 Nm Porsche Macan S. If a proper BMW X4 M is ever released, that one will be the one to compete with the 400 hp, 550 Nm Porsche Macan Turbo.