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      10-21-2012, 09:18 PM   #39
DUI Elite
///M at Heart
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Drives: 2006 SGM E90
Join Date: Jan 2011
Location: Chicago, IL

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Quote:
Originally Posted by jc5988 View Post
i guess from past thread, there are only one sensor after the main cat before the secondary, so even u cut the secondary, the DME wont know its gone.

smog check via obd port will not notice it too, however, visual probably wont pass.
Hmm, thats pretty awesome. I wonder if you can see the same gains on stock exhaust. Thanks for the reply.

Out of curiosity (yeah, I have to know cuz i'm lost) what is the visual test?

They've always only hooked up to my OBD port and checked that all the sensors are ready.