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So I'm running an Akrapovic Evo (no primary cats + race cats post-sensors) plus a BPM Stage II tune and I've passed for two years in a row in NYC. As for emissions readiness, O2 monitors never go ready since rear O2s are turned off in the tune but everything else goes ready and I don't have a CEL. It's probably worth scanning the car and seeing where you're at.
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