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Direct Replacement Mercruiser GM Big Block Center Rise Exhaust Manifold, MC-1-89011
Direct Replacement Mercruiser V8 GM Big Block Center Rise Exhaust Manifold, MC-1-89011. Fits Mercruiser models 330, 340 and 454 magnum. Replaces Mercruiser # 89011A8. For inboard and sterndrives.