Yes, well… it almost does. This is why race cars tend to be louder. There is not much after the manifold Some nice tubing and that is about it. (they still have specific measurements). Exhaust systems certainly play a critical role in the performance of every engine.
Air Pollution is one of the big problems in the world. Maybe, it is not getting enough attention now. But statistics and data show that times have changed now. Global Warming, Excess Cold, Unexpected floods are the alarm to approaching danger.