Actually, most all of you figured it out. I think it is really neat, but this guy went through a great deal of pain and coin to do this. My question is, why stop at 6 cylinders, make it an in-line 8 instead of throwing away a couple cylinders and chopping a 1/4 off 2 heads to get 6? Either way, it truly is a wicked engineering effort. Won best engineered car at a National event last year.

More redigested info:

http://www.yellowbullet.com/forum/showthread.php?t=289099