Sierra MerCruiser 4.3 Liter V6 Exhaust Manifold 99746A17 9975 18-19521

Sierra 18-1952-1 Replacement Exhaust Manifold Kit For MerCruiser V6 4.3 Liter 02 and older engines Will not work for dry joint systems Kit Contains: • 1x Exhaust Manifold • 1x Mounting Package • 1x Manifold to Riser/Elbow Gasket • 1x Manifold to Head Gasket • 1x Drain Elbow Plug Replaces: • Osco: 9745 • GLM: 51220 • MerCruiser: 99746A17 • Barr marine: 1-99746 Sierra manifolds are painted, packaged and leak tested. Sierra 18-1952-1 Replacement Exhaust Manifold Kit  For Sierra MerCruiser 4.3 Liter Exhaust Manifold V6 Engine Clean exhaust channels, high quality, homogeneous wall thickness externally, shot-peened for a smooth finish to provide a precise gasket mating surface, all mounting surfaces have been CNC machined.  Exhaust channels are clean and of good quality, with consistent wall thickness. Externally, shot-peened for a smooth finish. Surfaces for mounting CNC machining ensure a precise gasket mating surface. The manufacturer examined for leaks and applied a baked enamel f