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.