So I would need a Banshee axle and a bearing set and it will fit fine in my 03 carrier?
The warrior axle is a negative sorry. As for fitting a 2000 I think you need a bearing carrier too.
you will also need the banshee brake hub i run into that problem along with others, but yes other than that it works makes it 2 3/4 inches wider pretty nice. Also raptor 660 axles work but not the 700's they are also the same length as the banshee's.