Originally Posted by Endless Details
Best bet is to become friendly with a service advisor or get a Bavarian scan tool...
The aFe drop in I wasn't looking for performance I just wanted it to breath better... Should help with mpg also
I might get the aFe drop in one, but when I look over on their website, they have a lot of them but none for X1, when looking for other N20 engines, they have several different type for different models. Can you provide me a link on the one your purchased for your E84 28i?