09-17-2012, 10:07 PM
|
#7
|
Drives: 2016 535d
Join Date: Apr 2012
Location: Savannah GA
|
Quote:
Originally Posted by NRG
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
|
|
|