BMW 3-Series (E90 E92) Forum - View Single Post - 100% UNDECIDED about a K&N drop in cone filter.....any thoughts?

will bleich · 10-18-2012, 06:19 PM

Cheers all.[/QUOTE]

i also heard cutting the backing off the stock filter helps, carbon filter or something(idk what its called)

10-18-2012, 06:19 PM	#15
will bleich First Lieutenant 27 Rep 394 Posts Drives: pos Join Date: Sep 2012 Location: Pennslyvania iTrader: (1)	Cheers all.[/QUOTE] i also heard cutting the backing off the stock filter helps, carbon filter or something(idk what its called)
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