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      09-18-2012, 12:42 AM   #9
Lieutenant Colonel
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Russian Federation

Drives: 2012 X5 35d
Join Date: Mar 2007
Location: Montreal QC

iTrader: (5)

Originally Posted by Pierre Louis
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:

I've read that before, I'm aware. But the fact that my truck runs higher then stock boost settings with remap I'm aware as well. X5D stock filter is double layered paper+cotton ( sort of) I've tried blowing air through it with air gun vs K&N and results were obvious, K&N allows noticeably more air through. I'm not saying it's the best drop in out there simply flows better then stock X5Ds.

Retired: 2005 N52 E90 330i Sport 6AT
Retired: 2007 N54 E92 335i Sport 6AT

Current: 2012 M57 E70 X5 xDrive35D