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      02-16-2013, 11:40 AM   #5
CIWS
Moon Parasite
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Drives: F98 X4M Competition
Join Date: Sep 2011
Location: Texas

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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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2020 X4M Comp. (currently stock) - Was 2015 335 MSport -MPPK -Borla ATAK -Dinan Sport+ - E.R. Charge pipe / 2013 X1 35i Sport - Dinan tune / 2009 X6 50i Dinan badged
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