the 98-02 used a bolton system, so you either replace just the endcan, which bolts on, or the whole system. There is no slipon endcan for the stock exhaust on the 98-02's.
if you already have a hindle system, and just need the endcan, then most likely it will fit. Almost all hindle endcans use the same size inlet (2" I think) so the cans are the same on all the bikes, just the headers/midpipe are different.