I've never heard a negative word about Cosworth. AEM also makes some good dry filters, but I don't know if there's a drop-in one. I've got a Blitz panel filter in my track car, and it's been fine. It's not replaceable, though.
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2011 MB Touring-Sport-6sp-Nav/GTM TT/FI TT TDX/JTran/Kosmic/Eibach/Hotchkis/SPC/CSF/RPS/SoThatsWhereAllMyMoneyWent
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