http://www.m3post.com/forums/showthread.php?t=509914
What about the time BMW shoehorned the 700hp and 530lb/ft of torque, ~8,000 rpm redline 6.0l V12 from the BMV LeMans Sports-Prototype Racecar into an X5, to form the X5 LM?
The original plan was to use the V10 from the Williams-BMW F1 Racecar but that idea was scrapped because BMW did not have a transmission that could handle 18,000 rpm.