Hello and thanks for donating
No you don't have to use the Cali converter. You would only have to put a California Cat if you lived in California OR if your vehicle is registered under California for any reason. It does have to be a federally approved cat, but does not have to be California approved. Take it somewhere else would be my suggestion. Also test out the oxygen sensors, they can cause the engine light to come on with the codes similar to a faulty cat. Converter's trouble code.
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Wednesday, May 5th, 2010 AT 10:18 PM