Industry's only Infused Ceramic Aluminum direct replacement exhaust products. This product is not only coated on the outside surface but on all inner surfaces including the water jacket. Fits 454 cu.in. GM big block V8 engines. Fits both sides of engine. Replaces Mercruiser # 89011. Includes mounting kit with new manifold and riser gaskets and new fasteners. Technical Information.... Product Diagram....

NOTE: THESE ALUMINUM MANIFOLDS SHOULD ONLY BE USED WITH ALUMINUM SPACERS OR RISERS. DO NOT USE WITH CAST IRON OR STAINLESS STEEL COMPONENTS AS THIS WILL VOID ALL ASSOCIATED WARRANTY.

* 5 Year Warranty requires purchasing the separate anode (1 per manifold) on an annual basis.

Save $$$ when you purchase this part as part of a kit.