16472-P0H-A01 Injector Seal Ring - Overview. The 16472-P0H-A01 Injector Seal Ring is a precision replacement component designed specifically for fuel injectors within Honda marine engine systems as well as various Honda automotive applications including Accord, CR-V, Odyssey, Pilot, and Acura models from the 1990s through the 2000s. This seal ring plays a critical role in establishing a watertight and fuel-tight seal around the fuel injector base, preventing leaks that can compromise engine effi