---
title: Mufflers and Noise Levels in North Carolina
description: Vessel engines with open-air exhausts and the capacity to operate at more than 4000 rpm...
image: https://21118949.fs1.hubspotusercontent-na1.net/hubfs/21118949/courses/usa2024/images/images-transparentes/muffler-boat.png
---

![Mufflers and Noise Levels in North Carolina](https://21118949.fs1.hubspotusercontent-na1.net/hub/21118949/hubfs/courses/usa2024/images/images-transparentes/muffler-boat.png?width=1100&height=1003&name=muffler-boat.png)

Vessel engines with open-air exhausts and the capacity to operate at more than 4000 rpm must be equipped with an effective muffling device on each exhaust manifold stack.

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