17374-ZX2-000 Muffler Grommet - Overview. The 17374-ZX2-000 Muffler Grommet is an OEM rubber insulator designed as a critical component in the Honda marine engine exhaust system. It plays a vital role within the muffler system by cushioning and securing the connection between the muffler and mounting points, effectively absorbing vibrations and minimizing mechanical stress. This part ensures smooth operation and prevents premature damage, maintaining engine reliability over time. Engineered to m