US Air Intake Mod (EURO MOD) Pics Inside.
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01-04-2012, 10:08 PM
Drives: 2011 328i sedan
Join Date: Sep 2011
Axis, the 3" duct is air tight. The gap you see in the picture has no impact.
I had tried a 4" ABS coupler (actually a 3" coupler with 3.5" ID), could not fit in the tight space.
Apex's mod is the best you can get with the stock box.
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