The mysterious BMW M3 with a massive wing spied testing on the Nurburgring a couple of weeks ago has now been identified. It was this brand new M3 GTS, the most extreme 3 series-based factory car of the current E92 generation. (video)

Installed into the engine bay is a 4.4-litre V8 based on the 4.0-litre engine found in the standard M3. Maximum power is 450bhp (an increase of 36bhp) and the transmission is the 7-speed M dual clutch transmission (M-DCT) with adapted shift characteristics. The exclusive 19-inch aluminium wheels come wrapped inside 255/35 front and 285/30 rear tyres. (read more...)