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      02-16-2013, 09:44 AM   #3
CIWS
Moon Parasite
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Drives: F30 335i MSport
Join Date: Sep 2011
Location: D/FW

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Negligible power gains if that's what you're looking for. Best thing about them is their potential longevity vs a standard filter, but then they cost more too. Some makers warn of their use (oil based filter) because some of that might dirty the MAF sensor.
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2015 335i MSport -MPPK -Borla ATAK -Dinan Sport+ - E.R. Charge pipe -LLumar FormulaOne ceramic tint-aFe intake scoop and Pro Dry drop-in filter.
Was - 2013 X1 35i Sport - Dinan tune / 2009 X6 50i Dinan badged