Catalytic converter vs straight pipe compares two very different exhaust setups with distinct purposes and outcomes. A catalytic converter is an essential emission-control device that reduces harmful gases like carbon monoxide, hydrocarbons, and nitrogen oxides by converting them into less toxic substances before they exit the exhaust. It helps vehicles meet environmental regulations, ensures smoother engine performance, and reduces air pollution. On the other hand, a straight pipe exhaust removes the catalytic converter entirely, allowing exhaust gases to flow freely with minimal restriction. While this setup can slightly increase engine sound and performance, it also results in much higher emissions, poor fuel efficiency, and often fails legal emission tests.
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