* Engine design: BMW engines are designed to produce a lot of power and torque, and this can lead to a louder exhaust note.
* Exhaust system design: BMW exhaust systems are often designed to be high-performance, and this can also lead to noise. High-performance exhaust systems typically have larger diameter pipes and less restrictive mufflers, which can allow more noise to escape.
* Quality of materials: BMW uses high-quality materials in its exhaust systems, but over time these materials can deteriorate and become noisy. For example, the gaskets and seals in the exhaust system can wear out and leak, and this can cause a significant increase in noise.
It is important to note that not all BMW exhausts are noisy. Some models, such as the BMW 7 Series, come with more subdued exhaust systems that are designed to be quieter. However, BMW enthusiasts often appreciate the sporty sound of a loud exhaust, and they may even seek out modifications to make their exhausts even louder.
