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  1. CA, Previous owner removed Y Pipe with Cat, 05 IS300 5spd

    Basic Help & Repair
    Bought this car before smogging (like an idiot) and failed two different smog places. The y pipe containing the 3rd cat was taken out when putting in a custom exhaust. Part for reference: Thankfully the manifold wasn't touched, just from the manifold back I think. Does anyone know if I can...
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