You seem like you want to pretty much keep your car stock for the most part. I think if your just running stage 1 then I would keep the stock air box and put a K&N drop in filter as its not that bad of an intake to begin with
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[SIZE="2"]Crimson Red E92 335i M-sport 6-speed with MHD custom stage 2+ flash only , 40% E85/93 mix,+ HRE P40S wheels, KW Clubsport, M3 sways,+BMW performance CF Mirrors, BMW Performance CF deck lid spoiler,+ CF interior trim, p3 vent boost gauge,+ LUX angel eyes (11.73@124mph on street tires)
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