[fordteacherguy]

Can't tell you what is enforced around the nation , but most cold air intake kits have passed tech as long as air inlet comes in at stock location. MAF location unimportant by the rules but I would hesitate getting it too close to the TB. Reversion through a MAF tricks the hot wire into seeing the air twice and computer may deliver more fuel that needed and you will have a tuning nightmare. We usually keep it away as far as we can although stock location has worked fine on my projects.