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Cattless downpipes and CEL light?
I purchased a set of downpipes and will install them in the next few weeks. I am interested in all of the options that I have to trick the ECU so I can pass emission testing in NC.
NC hooks their maching up to the OBD to test emissions. No sniff test.
I have a Cobb tune so the CEL light will be on with their tune until Stage 2 is released. However, I still want to be able to revert the tune back to stock and not see the CEL light.
So, what are my options?
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