Category Mercury MerCruiserMerCruiser - Exhaust System Back O-Ring Seal Kit 25-87400A2 Mercury MerCruiser Sterndrive Parts & Accessories Viewer:1314 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 Cylinder Head Gasket 27-13709T Gasket 27-817277 Forward Inner Prop Shaft Seal 0853808 Throttle Cable 7081159