The 18th and 19th GTs produced were made on 7/21/2004. Only two GTs were made that day, one was yellow, one was black. The yellow one was VIN 0008. So actually that yellow couldn't have been the 17th made but may have been the 18th. Sorry, I don't know what "the Stillen car" is, but #0015 was red and was made on 9/17/2004.
That is the Stillen car. It was repainted met. orange with dark gray stripes by Steve Millen of Stillen Racing.