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BMW 3-Series (E90 E92) Forum
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Passing emissions with header
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| 11-02-2020, 05:07 PM | #1 |
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Second Lieutenant
 31
Rep 299
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Passing emissions with header
Hello folks just want to let everyone know you can pass emissions if your state doesn't have sniffer test with downpipe fix. The same ones that N54/55 guys use its all the same setup. It will works only on factory tune. Also if your having issues with idle get the mini cat spacer either from eBay or Racing Dynamic. This will fix your problem.
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