This Original Equipment Manufacturer part is the same part that was made & installed by the car manufacturer at the factory where the car was produced.
OE Replacement
Also required, but not included with the water pump, are gasket #19313-P5G-000 (between the top of the water pump housing and the bottom of the thermostat housing) and o-ring #91312-PY3-000 (at the back of the thermostat housing). Order 1 of gasket 19313-P5G-000 and 3 of o-ring 91312-PY3-000 separately.