Catalytic Converter Changed

The Miata did not pass the smog check and it was because of the bad catalytic converter. The catalytic converter (CAT) is a device installed in the exhaust system to significantly reduce the emission levels of hydrocarbons (HC), carbon monoxide (CO), and oxides of nitrogen (NOx).

The CAT is a catalyst and it is designed to function for a limited time, and require replacement. How long a vehicles CAT will last depends on how completely the engine burns fuel before presenting it to the CAT and also on the quality of the CAT. I chose a factory OEM CAT in hope of lasting for next 10 years.