Port & Starboard Mercruiser Manifold
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Port & Starboard Mercruiser Manifold

Replaces Most Mercruiser GM/Chevy V8 Big Block Center Rise Manifolds
By: Sierra

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Fits Engines: Most Mercruiser (GM) V-8 big blocks, either side. Replaces Mercruiser part #89011A8,OSCO9011 etc. Fits either port or starboard side. Comes with manifold and riser gasket and bottom water fitting (with built-in drain).
This manifold will replace most Mercruiser GM/Chevy V8 Big Block center rise manifolds. Includes all pipe plugs and mounting gasket. Fits 454 and 7.4 liter.Fits either side. 3yr warranty. Use this chart to match other aftermarket part numbers to this part: Osco: 9011 Barr: MC-1-89011 Sierra: 18-1957-1 Aqua Power: 5506 GLM: 51240.
Use with: Exhaust Manifold Gasket: 18-0418 Mounting Kit: 18-8532

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