View Single Post
      03-13-2013, 04:22 PM   #74
CanAutM3
Brigadier General
 
CanAutM3's Avatar
 
Drives: 2015 M4 DCT
Join Date: Jan 2012
Location: Montreal

Posts: 3,593
iTrader: (0)

Garage List
2015 BMW M4  [4.50]
2006 Audi S4  [0.00]
Quote:
Originally Posted by coogs08 View Post
I just installed a K&N filter last night. Don't notice much except it is a little louder at higher revs.
Your 2009 MY is in the category that will get the most benefits from changing the filter (by getting rid of that charcoal liner). However, 2-5hp is not something you will obviously notice from the seat of the pants. But all the small improvements combined together do eventually add up.
CanAutM3 is offline   Canada
0
Reply With Quote