Sportauto has posted a video of a BMW Motorsport M1 Procar lapping the Hockenheimring with Harald Grohs behind the wheel. Grohs drove for BMW from the mid-1970s through the 1980s; during that time, he drove the famous 3.0CSL, an M1 Procar, and a 635CSi. Harald has reportedly driven in over fifty 24 Hours endurance races, mainly the 24 Hours of Le Mans and 24 Hours of the Nürburgring. There is no commentary with the video, but we're fine with that as you get to hear the amazing sound of the M88 inline 6!—Nate Risch
