The Vetus Muffler/Gooseneck #NLPG90 is a space-saving solution that combines noise reduction and water backflow prevention for your boat's exhaust system. With fully rotatable sections and hose connections, it makes installation a breeze. Plus, the built-in water mixing provides an efficient and quiet sailing experience. Benefits Combines muffler and gooseneck functionalities Prevents water from backfilling the exhaust Reduces exhaust noise through additional water mixing Negligible back pressure Fully rotatable sections and hose connections Standard air vent hose stub included Available with hose connections of 40, 45, 51, 60, 75, or 90 mm This muffler/gooseneck model features robust construction designed for marine environments. It has a hose connection diameter of 90.487 mm and is compatible with various hose sizes, providing versatile fitment options for different exhaust setups.Our Part # VTSNLPG90 | Mfr. Part # NLPG90