BMW unveiled its ALMS racing M3 at the Chicago Auto Show today. Upgrades include a tuned 4.0L V8 that pumps out 485hp and weight reduction. Click here for first picture in gallery.

BMW also employed its extensive F1 knowledge into the M-racer, including computational fluid dynamics and wind tunnel analysis to make the carbon fiber-winged M3 slip freely through the air.

[via Autoblog]