I'm going to install a afe 2 stage CAI next week (hopefully it arrives in time), and was reading up a bit on other modifications. I came accross a post at a different forum about the need to add a Crankcase Vent Filter Breather since the oem filter case is removed.
Any ide if this is true, snce I have not read anything like it on this forum, at all.
Here is a link for such a item:
http://www.amazon.com/MAGNUM-WASHABL...words=bmw+128i
Thanks