Intake air tube size?

Thanks guys!
The air box is commin out real nice, i got the frame tacked in and lookin good... i test fit the tire in there with suspension fully compressed, and i only gotta trim about 2" out of corner, not bad!! Just alot of thinkin how to do it, then alot of test fitting!
But this air box is really gunna make the swap real clean!
I was thinkin of lazer cutting in some kinda logo in the lid, with clear plastic behind.. like a pentastar, or maybe the scat pack bee!