Exhaust tips do not play a major role in the sound of the car. The type of the engine and mufflers determine the sound more than anything. So, if you want to make the car louder or modulate the sound, you can do so by altering the muffler structure. Some people even completely remove the stock muffler and use a custom one that is louder. But this is not legal in most countries. By using a turndown exhaust trim, you can create an illusion of a louder sound for those sitting inside the car without actually increasing the overall noise of the car. Somebody who is standing a few meters away from the car won’t feel any difference.