View Single Post
      12-21-2012, 09:55 AM   #5
Julesandtrish
Second Lieutenant
Julesandtrish's Avatar
4
Rep
200
Posts

 
Drives: 335d
Join Date: Jan 2010
Location: North Carolina

iTrader: (1)

Garage List
2010 BMW 335D  [5.00]
Quote:
Originally Posted by FormerRotor View Post
I believe that this acts as acoustic dampening, but it may also have something to do with the spring-loaded secondary air assembly in the box. Yes, the filter is installed with it on (it's glued on).
Excellent. Thanks for confirming this. So far this is the only BMW I have come across with this "glued" piece in place on the oem filter. Do you guys think it is restricting airflow?
__________________
Enjoy what you drive.