What is the difference between dual exhaust pipes and single exhaust pipes?

[McGenesis]

The difference between dual exhaust pipes and single exhaust pipes lies in the vehicle's displacement: high-displacement vehicles are equipped with dual exhaust pipes, while low-displacement vehicles have single exhaust pipes. The functions of exhaust pipes are: 1. Reducing environmental pollution: The exhaust pipe contains a purification device, with a three-way catalytic converter that effectively cleans harmful gases from the exhaust; 2. Ventilation and exhaust: The car exhaust pipe operates in a cycle of intake, compression, power, and exhaust. Without an exhaust pipe, the car would not function; 3. Noise reduction: The exhaust pipe is equipped with a muffler, which reduces the vehicle's noise. The principle involves diverting airflow through multiple channels, causing friction and collisions between the diverted flows, gradually reducing the airflow velocity and repeatedly cycling to lower noise.