FMF Fatty for KX310

[MarkSims]

I have a 2000 KX310 Eric Gorr special. I can't say enough about the engine on that bike and that's why I can't seem to part with it.

Currently, I'm running the stock exhaust. Does anyone know how an FMF fatty and shorty or Titanium 2 silencer would change the powerband?

Thanks! Mark