Well for starter's the 1997 indy 500 is a fuji motor. The 1999 and 2000 xc 500 has case reed induction, I'm not sure the name of the motor though. The motors are totally different. So therefore pipes will not work. Just look at the size of the pipes, the xc 500 is like twice as fat.
Bring on the snow! You can never have to much.
if you look at the spots on the block so tmount the pipe, it is the same.......my brother did it..i'll get the scopp from him..idk, mabye he had to mod something but for the most part it will fit..