Here is a set of photos of the most revealing M4 prototype yet, together with a great video of the M4 being tested hard at the Nurburgring.
For the latest M3/M4 info and details, see our compilation at:
http://f80.bimmerpost.com/forums/sho...d.php?t=602770
Also see M3/M4 features:
http://www.bimmerpost.com/m4/
http://www.bimmerpost.com/m3/f80m3/