N51/52/53 Drop-In K&N Filter!
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04-10-2010, 10:56 AM
BimmerPost Supporting Vendor
Drives: 2007 335i, 2015 M3
Join Date: Dec 2008
Originally Posted by
is there any sound differences from a drop in filter like this one and stock?
There should be a modest increase in sound, but nothing like going with a complete intake.
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