Ok.
Well, if you guys really like Nelson. Then you'll love Sonny.
Sonny Racing Engines produces the 932 cubic inch 2000hp+ naturally aspirated (no nitrous) monster.
http://www.sonnysracingengines.com/e...-racing-engine
Edit: Each header primary tube on this engine is the size of one of my downpipes...
2.7 inch intake valves, over 1.1 inch of valve lift. Over 5 inch bores and close to a 6 inch stroke. Spin to 8100 RPM.