<p><b>Product Description:</b></p> <p>New exhaust manifold for 1985 through 2002 MerCruiser 4.3L marine gas engines (GM / Chevrolet V6). This manifold will fit either side of the engine and accepts all factory original accessories and fittings. Comes with gasket kit, new lower water fitting with built-in drain, mounting bolts, and all necessary plugs. Each purchase is for one manifold.</p> <p>Riser mating bolt dimensions are 3-7/16" (87.3mm) by 3-1/16" (77.8mm) bolt center-to-center.</p>