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The OBD2 smog-legal cats CPI uses have passed on every E46 M3 that's gone through emissions. From a pricing point, $769 is too low for the SG to use the same cats IMHO. The cats alone are almost $500, plus there are laser-cut flanges, piping, bending, welding materials, labor, shipping, and R&D costs which must be made up... So, I'm optimistic in that I don't think they are the same cats and will pass smog.
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