Thread: Best Downpipes
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      03-13-2018, 07:44 PM   #11
Rocketsoda
'13 M5
Canada
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Drives: 2013 BMW M5
Join Date: Mar 2015
Location: Montreal, Quebec, Canada

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[QUOTE=Dracon;22905612]I'd just gut your stock downpipes. Or buy an OEM set off eBay for like $200 and knock the cats out (so you still have your original pipes to put back on).

Would gutting the stock cats cause issues if the CEL light stays on? Someone mentioned the ECU might cut power? I'm down to gut the stock downpipes but want to make sure leaving the light on won't be a problem
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