Haha lets not start a war (like what has happened in many other threads) but chaging to a high flow air fillter will give more volume and thus power BUT the power gains are pretty much not existent. At best it's 1kw/5nm, throttle response will be slightly better as well. The fact is the less restricting the filter is the less vacuum you have on the intake - and less vacuum is less turbo lag amongst other things
Don't think that just changing the filter will show big gains because it won't, that's what a CAI is for - sort of

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