75 MM DEMPMP Wet Exhaust Muffler | Vetus DEMPMP75Vetus Waterlock Muffler 75 MM DEMPMP Wet Exhaust Muffler Vetus DEMPMP75 3 in. Plastic Waterlock Muffler Collects water present in the exhaust system when the engine is stopped Creates additional mixing of the water inside the exhaust line, resulting in even better noise reduction Causes almost no resistance to the free flow of exhaust gases