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      01-30-2013, 04:10 PM   #12
bigdaddycane
I even mod my cereal
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Drives: 2007 335i Sedan
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I feel they are thinking of emissions primarily, but don't realize they can fail with the catted DPs....and yes, the main cats are huge restrictions.

You (Jeff) know this, but (for others) if you leave the secondary cats in place the rasp really isn't present and the smell is minimal.
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