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      09-17-2012, 11:07 PM   #7
Pierre Louis
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Drives: 2016 535d
Join Date: Apr 2012
Location: Savannah GA/Orange Park FL

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Quote:
Originally Posted by NRG View Post
I use K&N in my D. The X5D filter is as thick as the brick and extremely restrictive. Not sure if the same in E90.
Here is some real data: http://home.roadrunner.com/~jbplock/ISO5011/SPICER.htm

PL