My catalytic converter is rusted out I need a new one but there is no tag under the hood that says it is or is not California emissions how else can I find this out?
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Are you located in California, and trying to pass emissions there? If you aren't in CA then I don't think it matters what cat you run (as long as it's 49 state legal).
New York which follows California but if it came with a fed emissions then I came out that back, but there is no tag label or sticker or evidence of any under the hood