New exhaust manifold for MerCruiser 1983 through 2003 5.0L (305 cu. in.) and 5.7L (350 cu. in.) V8 marine gas engines (GM/Chevrolet small block). Fits MerCruiser models 200, 230, 260, 320, 300, and 898. Does not replace newer dry-joint style manifolds or older log style manifolds. This manifold is a center rise style, will fit either side of the engine, and accepts all original mounting brackets. Comes with gaskets, lower water fitting, mounting bolts, and all necessary plugs. Each purchase is for one manifold.
Riser mating bolt dimensions are 3-7/16″ (87.3mm) by 3-1/16″ (77.8mm) bolt center-to-center.