Any benefit to K&N Filters on a stock X5M?

[wallyx5]

Originally Posted by Rez90

I was looking over the wives car today and pulled the air filters. They definitely need to be replaced and was curious if the K&N replacements offer any benefit. I've seen that on some stock cars they actually cause a leaner AF Mixture causing CEL's and whatnot but i was curious if anyone here had any experience or insight.

Also...what are the white filters behind the air filters? They also looked pretty cruddy.

Thanks in advance.

Benefits:
Better air flow
lifetime air filter

There will be no lights, that's silly.

But I would recommend you pull the carbon filters which are a real hp sucker while you are installing your K&Ns.