You can get a real good feel for the content of the book here:http://www.bentleypublishers.com/gallery.htm?code=G309&galleryId=1484

And perhaps actually a download of the book here (I've never used this service, but some folks say it works well). http://www.bushtorrent.com/torrents.php?search=&words=The+Scientific+Design+of+Exhaust+and+Intake+Systems

I just got my engine back together and i have the 6 to 2 to 1 headers but i also have the twice pipe system so i will be running duel exhaust all the way back. will give you an update on what power is like and how they work.