It includes what they referred to as "port balancing, or flow balancing" intake to heads etc.
From what I understand, the process virtually de-burs and polishes all the internal passages much like the old fashioned hand porting and polishing, but does it in near identical tolerances. They also said they can increase the size of the passages to a specific percentage within the tolerances of the part.

I was told that additional hand polishing could provide a bit smoother surface after they complete their process, so I may get in there with one of my polishing wheels after they return the parts... Depends on how smooth they look...