Sounds about right, maybe a bit more hp than I'm making, but I haven't dyno'd my motor so that's just a guess.  Intake and exhaust have a big effect on power.  If my exhaust runners were equal length and tuned, my motor would probably be within a few hp of those numbers.  But since I don't have room under the cowl for long pipes, I'll have to live with what I get.  What I can say is that I picked up 20+ knots on the top end over the original side-port 20b motor.