Is an Aftermarket Catalytic Converter Effective?

[VonKevin]

It is effective, but only if the aftermarket part is of reliable quality. Here are the relevant details: 1. Function of the catalytic converter: The primary role of the catalytic converter is to oxidize and reduce three harmful gases—CO, HC, and NOx—into non-toxic and harmless substances such as water (H₂O), carbon dioxide (CO2), nitrogen (N2), and oxygen (O2). 2. Working principle of the catalytic converter: When high-temperature exhaust gases pass through the catalytic converter, the purifying agents inside enhance the activity of CO, HC, and NOx, promoting oxidation-reduction reactions. Specifically, CO is oxidized into colorless, non-toxic CO2 at high temperatures; HC is oxidized into H₂O and CO2; and NOx is reduced into N2 and O2.