Have 1 pair of Sierra manifolds and risers for sale. Purchased for a Gen 4 Mercruiser 454. Comes complete with gaskets and mounting hardware. Brand new. Never used. 2 boxes opened to make sure they were correct. Changed engine and now need different exhaust. Will consider partial trade and I will add cash for Stainless Marine exhaust. Best offer plus shipping. I paid a little over $500 for the set

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