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      06-15-2009, 11:14 AM   #14
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Drives: 335i - E92 - 6MT & 4runner SR5
Join Date: Mar 2007
Location: MD

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2007 BMW 335  [4.50]
Originally Posted by ontopofm View Post
i bought the 59956 which is 2.36" but it is larger the oem pipe, the 59955 is exact fit.
Great info!

This was a little test table that I found somewhere on the internet a couple of weeks ago. I believe it says that unrestricted, under the test configuration the pipe will do 1000 CFM, with some stock cats 300 CFM, and with Hi Flow, Spun Metallic 600 CFM:
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