You'll need to re-jet, but unless you're planning on more serious mods for the 600, you won't gain any power over a jet kit that retains the airbox.
IIRC, the 600 uses the same pods as the 1200 - K&N #RU-2922. You can go to the
K&N site and look up all the dimensional specs on the above p/n and double check. If that's not right, you should be able to find the right p/n using the dimensions you come up with compared to their charts.