Tagged in Econ but not really sure it fits here either. Thanks all.
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CARB mandated warranties are to blame for the inflated prices.
A CARB-compliant catalytic converter is one that has been approved for sale by the California Air Resources Board (CARB). CARB emission standards for aftermarket catalytic converters are more elaborate than the EPA standards for aftermarket catalytic converters and requires a more extensive warranty than the EPA.
As a result, CARB-compliant catalytic converters typically use an enhanced combination of washcoat technology and higher precious metal load to meet the stricter emissions conversions standard. A CARB-compliant converter will also have an Executive Order (EO) number/stamp on its body. The stamped number on the converter body must match the correct EO number listed on the California Air Resources Board website for aftermarket catalytic converters.
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