The afe loses a lot of back pressure that the stock airbox is able to create. I put in the afe and noticed the same drop in responsiveness and torque and yet reinstalled the stock box noticed it return. I'm working on trying to mod mine with scoops and some sort of mod to help with this but as of yet haven't thought of anything.
I Agree though... The sound is killer! Haha
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The Whale
2008 e92 328i 6MT \\ Matte Black Grills \\ AFE Stage 2 Intake
19" VMR v713 Matte Black
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