GM Small Block Center Rise Exhaust Marine Manifold - V-8 | SIERRA 18-1997-1 For use with both the port or starboard side of the engine. Fits most GM 283, 305, 307, and 350 small block engines. Contains exhaust manifold gasket set (18-0604), exhaust manifold gasket (18-2949), exhaust elbow mounting Kit (18-8536), riser (18-1907 and 18-1939), manifold spacer (18-1949), elbow (18-1999), exhaust manifold gasket (18-2902), exhaust manifold gasket (18-2902-9), fuel elbow (18-8112). GM V8 Small Block Center Rise Exhaust Manifold For both port and starboard sides of the engine Fits most GM 283, 305, 307 and 350 small block engines Chris Craft 283, 302, 307, and 350 CID Engines Crusader 283 and 327 CID Engines thru 1964; 305, 307 and 350 CID Engines 1965 and later Daytona 200-283 and 300-327 Flagship 283, 327 and 350 CID Engines Pacer 305, 307 and 350 CID Engines 1965 and later Mercury 190, 198, 225, 250, 270, 228, 898, 260, 255 and 280 models OMC 283, 305, 307 and 350 CID Engines 1968 - 1980 Volvo 307 and 350 CID Engines Replaces Barr CHV-1-83 Replaces Indmar 531051 Replaces Osco 994 Contains exhaust manifold gasket set (18-0604), exhaust manifold gasket (18-2949), exhaust elbow mounting Kit (18-8536), riser (18-1907 and 18-1939), manifold spacer (18-1949), elbow (18-1999), exhaust manifold gasket (18-2902), exhaust manifold gasket (18-2902-9), fuel elbow (18-8112)