Thread: 335i 8AT upshift POP/BANG sound
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      10-29-2013, 12:39 PM   #36
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Quote:
Originally Posted by cailas View Post
What about errors with catless downpipe and stock catback?
you will get a cel with any downpipe (catted or catless). Just a matter of when it triggers. Could be few hundred miles or even thousands.
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