New BMW M3 and M4 leak online ahead of tonight's unveiling

Next-gen performance duo share bold new front end and turbocharged 3.0-litre straight-six
The next-generation BMW M3 and its two-door M4 sibling have been revealed in a series of images posted online ahead of their official debut tonight. 
Shared on Reddit by user Avaley, the high-quality images confirm that Munich's mechanically identical performance duo will wear the same vertically oriented front grille as the newly revealed second-generation 4 Series, rather than a variation of the