The 2003 show had the largest ever attendance, 810,699, and the limits of concept excess were pushed further with the 7.0L V-10 Ford 427 Concept, which had a V-8 hastily expanded to 10 cylinders in response to rumors that Cadillac was going to show a V-10, only to be outdone when the rumored V-10 turned out to be the Cadillac Sixteen, with a claimed 1000 horsepower V16 that could shut down 8 or 12 cylinders at a time to save fuel.