You can get some vacuum hose from a local auto parts store, slit it down the middle and fit it over the edges that the intake tubes pass through in the radiator support. I did this proactively and have never heard a peep and they've been on for 8k miles. That's what I'd recommend, sorry you have to take the bumper off again!
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-320whp / 259wftlbs-
SP Rays -- RE-11s -- SpecialtyZ Tune -- Swift Springs -- Stillen 25R Oil Cooler -- Stillen G3 Intakes -- Berk HFCs -- F.I. 12" CBE -- Stillen Sway Bars -- Es14 Spring -- INGS+1 lip -- CF Spoiler -- GTR Start Button -- VLED Parking Lights -- PWJDM V2 shift knob
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