How much does it cost to add thru hull exhaust on a boat?

The cost to add a thru-hull exhaust on a boat can vary widely depending on factors such as the size of the boat, the type of engine, and the materials used. On average, you might expect to pay between $500 to $2,500 for the installation, including parts and labor. Custom modifications or higher-end materials can increase the cost further. Always consult with a marine technician for a precise estimate based on your specific requirements.