The first thing I would do is replace the air filters, they could have picked something up which has an unpleasant smell and is just sitting on the filters. That would also be why you don't smell it with the air con recirculating, it bypasses these external air filtration filters.
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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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