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      02-04-2020, 12:07 AM   #1
F10n63
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Drives: 2013 550i xdrive
Join Date: Jan 2019
Location: Massachusetts

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N63 gutted stock downpipes?

Can you gut the n63 stock downpipes? If you can will it aid in passing inspection(MA)?
With aftermarket pipes there is a "cat not ready for testing" issue during inspection that seems to have no solution outside of swapping back to stock every year. Your allowed to throw one of these codes, but not two. Two pipes = 2 codes.
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