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      06-11-2008, 12:47 PM   #2
MorpheIS
Second Lieutenant
United_States
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Drives: 335i 6MT, Sport, Prem
Join Date: Nov 2007
Location: New York, NY

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I ended up going with Zeckhausen after speaking with David Zeckhausen. I'm not sure what the differences are with the other distributors you mentioned, but I know the Zeckhausen product is a modified stock CDV with the interior removed. The CDV is not drilled out (I recall seeing some that were when I was shopping around) and since the valve is stock, it has the correct part # on the exterior and won't raise any suspicion by a service technician that may glance at it.
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2008 335i Coupe, 6MT, Monaco Blue, Saddle, Sport, Premium, Comf Access, Nav, iPod, CDV Swap