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This debate was done years ago for the WRX. Plenty of data said the stock air box was good until 400 hp, but so many wanted an intake. In the twins case the intake will not hurt, but on the WRX it definitively could hurt and did for many who tried it. Spending money on a tune for an intake is wasteful and many did not do it, Most that wanted added am intake to other changes before they got a tune, which was fine. Still some tuners had trouble with the maf.
Simple thing is if you want one, get it. Just don’t expect any real gains over a drop in filter, other than looks and sound.
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