Correct Narrow brands are pointless for anything but a flashing light , they will give you no useable information at all
To say you don't want a tune because you want to "go legit" but your CAI and your exhaust unless you have CARB stickers for them would make you non carb legal
The best thing you can do is a tune this way you can read your voltage , rpm , and hundreds of other things you haven't thought about , also add a wide band air fuel and bring all your mods together for the performance you added them for
There is no way for any state to know through any inspection that you have anything but a stock tune in your car , They cannot see you added a tune, Ford Dealer cannot even tell if you gave them your ECU
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