17380-ZY1-010 Muffler Plate - Overview. The 17380-ZY1-010 Muffler Plate is a crucial component within the Honda marine engine systems, specifically designed for the muffler assembly system. Acting primarily as a mounting bracket or protective cover, it supports the muffler system ensuring reliable and consistent exhaust function. This OEM part is crafted to meet rigorous factory specifications, guaranteeing seamless integration with your engine's existing hardware to maintain optimal performance