So you want a 4 inch custom intake, made from 4000ks away with second hand bits? Sorry Justin, I can't work miracles.
BTW, I am making 350kw on a 3 inch pipe, why do you feel 4 inch is required? Or a custom airbox for that matter? The 80mm one above will do you fine. If you're running map sensored can't you just vent the bov?