"CHICAGO — BMW has unwrapped a new racing version of the M3, designed to compete in the 2009 American Le Mans Series in partnership with Rahal Letterman Racing.
The racing car, prepared by BMW M GmbH, features a P65 motorsports version of the M3's 4.0-liter V8, boosted from 414 to 485 horsepower and from 295 to 368 pound-feet of torque. The engine is mated to a six-speed sequential racing transmission with a carbon-fiber clutch and a mechanical limited-slip differential."
Full article here : 2008 Chicago Auto Show: BMW M3 Race Version
