The biggest reason why that's the case is because a chambered sports muffler allows for some noises to be eliminated and others to get through easily. 😀
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Performance and Power: How to Choose the Right Muffler ...
australia1337.mystrikingly.com

Performance and Power: How to Choose the Right Muffler ...

The exhaust is the only set of components of a car that help both improve how it sounds and how it performs on a daily basis. All that while being able to do its main bit which is