Snapped during a refueling stop, the prototype has an aggressive body kit with new bumpers, revised side skirts and a four-tailpipe exhaust system.

We've already seen the BMW M6 Convertible undisguised, but here are the latest spy photos of the upcoming model.

Snapped during a refueling stop, the prototype has an aggressive body kit with new bumpers, revised side skirts and a four-tailpipe exhaust system. We can also see high-performance brakes and unique alloy wheels.

Power will likely be provided by a twin-turbo 4.4-liter V8 engine with 560 PS (412 kW / 552 hp) and 680 Nm (502 lb-ft) of torque. However, rumors have suggested the model could have an increased output of approximately of 570-580 PS (419-427 kW / 562-572 hp). Regardless, we can expect the engine to be connected to a seven-speed M Double Clutch transmission.

The BMW M6 Cabrio will reportedly be launched this spring, so look for a possible unveiling at the Geneva Motor Show.

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BMW M6 Cabrio spied making a pit stop