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      07-29-2019, 10:29 AM   #6
Mr. Liu
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Drives: '11 M3 '14 E63 '05 E55K
Join Date: Jul 2010
Location: Southern California

iTrader: (1)

I just went through a whole month of figuring out smog with the exact same issue you have. I finally waved the white flag and got a stock xpipe, everything is back to stock. My cat and 02 are all ready after driving about 50 miles, and the only thing I have to get ready now is the EVAP.

I suggest you not mess with the headache and just swap back to stock
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