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      10-03-2010, 10:58 PM   #5
spyderdoc
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Drives: 2018 X5 35d. 2016 Porsche GT4
Join Date: Jul 2010
Location: San Jose, CA

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Quote:
Originally Posted by TurboFan View Post
Good info. I need to check my diesel to see if this is an option
Please correct me if I am wrong, but I believe that the diesel does not have the flap to begin with, and that the exhaust always flows out of both sides......If you look at the exhaust pipes, they have the same degree of exhaust residue on them, whereas the NAs will have one side that is black, and the other clean......
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