BMW six-cylinder triturbo for the new M3. Still no decision on M1 and Z4 M

They come to the ambitious plans further confirmation that BMW is preparing for the future of the M3. After the brief of the current V8 mounted on E90, E92 and E93, it seems almost certain that the house will return to the German tradition, with a new six-cylinder in-line. But that will not be an aspirated "old school", but a modern turbocharged, which will exploit the pressure of three turbines,