The first images of the 2013 BMW M6 Gran Coupe have surfaced the Internet. Could debut next month in Detroit.

The first images of the 2013 BMW M6 Gran Coupe have surfaced the Internet.

Featuring a more aggressive styling with larger side skirts, flared wheel arches, bigger alloys, carbon fiber roof and revised mirrors, the new "M" member gets beefier brakes to match the additional horsepower.

Under the long hood is the familiar V8 4.4-liter twin-turbo engine producing 560 HP (412 kW) and 680 Nm (502 lb-ft) of torque borrowed from the latest M5. Power is sent to rear wheels through a 7-speed automatic transmission with the firm's smart active rear differential.

Aside from the engine transplant, the M6 Gran Coupe features a variable-assist hydraulic steering system and a Drive Dynamic Control toggle selector. Although we don't have interior photos yet, the cabin will get the typical M treatment with the usual steering wheel on which there are two M buttons.

An official announcement should be made very soon, before the car's probable debut in January at the Detroit Motor Show. It's expected to go on sale in mid-2013.

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