Will Removing the Catalytic Converter Increase a Car's Power?

[VonAnthony]

Removing the catalytic converter can indeed increase a car's power. The catalytic converter is the most important external purification device installed in a vehicle's exhaust system. It converts harmful gases such as carbon monoxide, hydrocarbons, and nitrogen oxides emitted from the car's exhaust into harmless carbon dioxide, water, and nitrogen through oxidation and reduction reactions. Its conversion function imposes some resistance on exhaust emissions, and its removal can enhance the vehicle's performance to a certain extent. However, after removing the catalytic converter, the vehicle's exhaust emissions will exceed the standard, causing severe pollution to the atmosphere. The oxygen sensor and OBD emission diagnostic system will detect the excessive emissions, triggering the engine warning light immediately, which cannot be reset.

[LeDaniel]

I've been into car modifications for over a decade and have seen many people remove their catalytic converters. While this modification does make the exhaust flow slightly smoother and gives a tiny bit faster RPM climb, the actual performance gain is negligible. Last time my friend removed it from his Civic for 0-100km/h acceleration, it was only 0.2 seconds faster. But the problems are numerous: the exhaust smells terrible and definitely won't pass emissions tests; the check engine light stays on constantly; the exhaust note becomes tractor-like. What's worse, modern cars have sensors that detect this, and removing it actually triggers the ECU to limit power output. If you really want performance gains, it's better to spend money on a proper ECU tune or upgrade the intake/exhaust system - it's both legal and more effective.

[AdamFitz]

As a professional in the environmental protection industry, I must say removing catalytic converters is extremely irresponsible. This component converts 90% of harmful gases, and its removal causes carbon monoxide levels in exhaust to skyrocket tenfold. While reducing exhaust backpressure may yield a 2-5% horsepower increase, the trade-off is emitting toxins equivalent to twenty normal vehicles per kilometer. Test data from modified vehicles shows nitrogen oxide concentrations exceeding standards by eightfold after removal. With increasingly stringent environmental regulations, such vehicles will inevitably fail annual emissions inspections and incur fines. The crucial point is that this minor power gain is virtually imperceptible - is half a second advantage during overtaking worth polluting the entire street's air?