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      01-07-2014, 11:18 PM   #2
JeffchaPz
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Drives: 2007 Z4M
Join Date: Sep 2011
Location: Austin, TX

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Hey bud, even if you get a tune you still need to have working post O2 sensors.

I actually cut mine trying to extend when I installed my headers and the SES light was on all the time. I order a tune thinking that would turn the light off, but I was told I still needed healthy working sensors. You CAN ask them to turn them off completely but you won't inspection.


Good luck.
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