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      02-13-2010, 01:36 PM   #22
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Drives: 2009 E90 M3
Join Date: Jun 2008
Location: Oahu, Hawaii

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Originally Posted by ********* View Post
They are fixed chambers. I meant that they are ported into the sideskirts which have a fixed chamber in them. In one of the threads they talk about how big it is...I think its around 1.4 cu ft.
I would agree that they are just passages to a larger fixed chamber. 1.4 cu ft is huge for an 8". I wonder why they decided to make it so big? Big is good for maximizing low end extension so maybe that was part of it.
09 E90 M3 - Interlagos Blue / Black Novillo / Sycamore Anthracite / Eibach / HRE

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