The green evolution in big-time racing is continuing. Audi may be getting some serious competition for overall victory at LeMans since 1999 (the Bentley victory was really a closed top R8 in spite of the British racing green paint job). Today Peugeot finally showed off their new 2007 LeMans challenger, the 908 RC. Mechanically this one has similar specs to the all-conquering R10 with a twin turbo-charged 5.5L V12. Where the new car is different is the closed cockpit. The first year of the Audi R8 in 1998 had both open and closed versions, as was the Bentley, but all the other winning Audi's have been open cars. This is one sleek-looking car and may even have an aerodynamic advantage over the open Audi. The twin exhaust systems each feature a particulate trap downstream of the turbos to clean the emissions. You can read all the details over on sibling blog AutoBlog courtesy of Autoblog editor John Neff.