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      02-16-2013, 01:40 PM   #5
CIWS
Moon Parasite
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Drives: F30 335i MSport
Join Date: Sep 2011
Location: D/FW

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When I had the M56 (N/A Japanese V8 420HP) I took the time to do baseline dynos. Then swapped out the air filters (M56 has two separate ducts/filters) with K&N. Re-dyno and no real difference, within % of error, at the wheels as measurable on the dyno.

Not all vehicles are the same, some will benefit from a swap odds are. Just depends on stock design and how easy it already breathes.
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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