Category Mercury MerCruiserMerCruiser - Exhaust System Back O-Ring Seal Kit 25-87400A2 Mercury MerCruiser Sterndrive Parts & Accessories Viewer:1294 Item No: 25-87400A2 Similar fits No: Sierra - 18-2649 GLM - 87400 Fits: R, MR, Alpha One, Gen II & Bravo You May Also Be Interested In Gasket 27-864547A02 Bellows Assy 70981A3 Complete Gasket Kit HS-711253 Piston Kit 09-818