I thought I have read good things about the AFE sealed stage 2 intake?
http://www.**********s.com/aFe-Stage-2-N54-Sealed-Air-Intake-System-135i-335i-335i-Z4-35i.htm
I like the n55 one from AFE tho, seems bigger sealed box, so it holds more air. Not sure if that makes any sense.
Kcc
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135i - AW
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