Category OMC Back Air Silencer Gasket 321497 OMC Sterndrive Parts & Accessories Viewer:457 Item No: 321497 Similar fits No: OMC - 0321497 / 0777954 Sierra - 18-0983 GLM - 35180 Mallory - 9-60429 You May Also Be Interested In Adapter to Powerhead Gasket 328618 Stub Yoke 3850814 Piston Kit 09-693 Drive Shaft Hose 272-000-184