Vetus MF125 Plastic Exhaust Muffler (127mm Diameter)Vetus MF125 marine exhaust muffler constructed from plastic, designed to reduce noise from the exhaust system. It is particularly suitable for boats where the exhaust line runs low down in the boat. This muffler creates additional mixing of the water inside the exhaust line to create better noise reduction. The muffler will also act as a waterlock when the engine is switched off. Please Note: Vetus exhaust components are made from plastic and must