17055-PNA-004 Gasket A - Overview. The 17055-PNA-004 Gasket A is an essential component within the Honda marine engine systems. Serving as an intake manifold gasket, its primary role is to create a reliable seal between the intake manifold and the cylinder head, effectively preventing air and fluid leaks that could impair engine performance. Engineered to exact factory specifications, this gasket ensures seamless integration with existing parts, maintaining optimal performance and durability.. K