Thread: N54 downpipes
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      01-04-2013, 12:30 PM   #7
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Drives: 2008 135i
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Originally Posted by m7ammed
In our country they put something down the exhaust pipe to test for CO and gases or something not sure what exactly will Catless dp pass that type of test?
No, absolutely not. Catless will fail any and all emissions testing there is no way around that (unless you've got a buddy at a shop).

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