40 MM Dual Stage NLP Waterlock Muffler | Vetus NLP40 Dual stage waterlock muffler features a body, inlet and outlet that rotate to accommodate many different boat exhaust configurations. Vetus type NLP muffler 1 9/16 in. hose connections accepts 1 1/2 in. (40mm) inside diameter marine exhaust hose Collects cooling water present in the exhaust system when engine is stopped Horizontal partition plate reduces exhaust noise Features rotable upper/lower chambers, hose inlet and hose outlet for easy installation even in compact engine spaces Base of muffler has mounting tabs for floor mounting Includes clamp restraints for bulkhead mounting Fitted with a drain plug for easy winterization 1.2 gallon capacity 15 5/32 in. overall length 6 1/2 in. width 10 in. height Ideal for gasoline or diesel inboard engine, sailboat engine and marine generator applications For use above or below the waterline 3 year warranty Replacement drain plug P/N VETUS-DRAIN Replacement hose connection o-ring P/N US004 Replacement hose connection P/N US001