if it gains more airflow up top then it will go leaner by that said amount also depends how rich u are now as to if its on the safer rich side or if its on a dialed in AFR for power, if u can monitor your 02's before the intake and then watch them after make sure they are still the same mv reading at WOT (usually above 800-850mv is good) if u see if dipping lower then its a sign fueling has shifted a bit and get it looked at, if it stays the same u are more then likely safe but if u can check it with a wideband, using the 02's isnt accurate for WOT but can be a early visual of an issue
If it was stock tune, it could handle it as the stock tune runs on the rich side.
Being modified and most likely tuned, afr probably gives less room for error.
Like 07GTS said, it's best to log it or just take it to get tune adjusted.
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