Id say anywhere between 200-250cfm which would result in hp figures from 250-450 hp...
Seriously you need to provide more info than just a pic of a intake port, which isnt a very good one at that..
..just kiddin
There is some smart guys on this board whom would be glad to help, but the info your provided isnt enough to tell anything...
A far as the port work go's, people cant tell from a pic, they can speculate all they want, but in the end its just a guesstimate.