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      08-11-2012, 08:33 AM   #39
Porschefile
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Drives: E92 M3
Join Date: Jul 2008
Location: Tennessee

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They also kind of defeat the purpose of the cheap brake cooling plan. My flanges from aircraft spruce were like $10 and do the same job. The Apex ducts may flow slightly better, but definitely not worth 20x. I did this DIY with success. The hard part is getting the hose to not rub when turning (especially parking).