The 2018 Honda Civic Type R exhaust system has three tailpipes stemming out its back end (and a muffler on each of the outer pipes) for optimal sound levels and airflow.
The flow of air through these three pipes will adjust depending on whether you’re driving at lower or highway speeds. The system is designed to create less noise and vibrations at higher speeds so the cabin’s more comfortable to ride in.
There are plenty of aftermarket options out there if you’re looking to upgrade your exhaust system’s sound. Before going ahead, though, you’ll probably want to check that the replacement you have in mind is compliant with your local laws and could pass an emissions test if your state requires one.