I am not doing any exhaust mods.
I like still being able to drop the hammer on a side road late at night. Without drawing any attention.

But how did you feel about the K&N drop ins?? They are fairly cheap so it is not a loss if they do not gain performance. But I do not want them to hinder performance.

I say hinder, because when i had my E46 M3, the factory paper filter flowed more then the K&N drop in. Infact some guy made a homebuilt flowbench and checked different filters!!! and the K&N had lower CFM over the factory paper.

Do these trucks have charcoal filters sandwiched with the air filters?

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2011 BMW X5 M
2009 Mercedes E63 AMG-FOR SALE or TRADE