This is a 5.3" bore space motor with one-off heads designed and built by Jeff Naiser out of Houston in their 5 axis CNC mill. This awesome piece is the new bullet for his Extreme 10.5 drag car and is just about too damn pretty to put oil in. I don't know the exact cubes but Jeff has always been a fan of big bore, short stroke. I seem to remember this piece will get spun around 9500-10k rpm. It appears it will have at minimum 3 nitrous systems and probably a 4th tucked on the inside of the runners. Jeff made the sheet metal intake himself. Thought you guys might like to see it. I know I can wait to hear it!