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in my old e39 which i owned from 2005-2015 I had a cold air intake, and never did i have an issue with CARB, until last summer, the same shop that always did my smog, failed me because i had an aftermarket intake.
Hence why i don't want to chance it with the oem m5 competition package cats...
btw i'll be posting the m5 competition package cats up for sale once my exhaust is installed (should have the car back tomorrow or thursday)
to the OP does this rpi exhaust have valves
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