Here's why:
* Regulations: Catalytic converters became mandatory in the United States in 1975 for cars sold in the country. However, older vehicles manufactured before that date might not have them.
* Vehicle type: Some vehicles, like certain motorcycles, ATVs, or off-road vehicles, might not be required to have a catalytic converter due to their specific use cases.
* Modifications: Some individuals modify their vehicles, potentially removing or bypassing the catalytic converter for performance or other reasons. This is illegal in many countries, but it does happen.
It's important to note: Catalytic converters are essential for reducing harmful emissions from vehicles, and their removal is generally discouraged due to environmental and legal reasons.
