Mercruiser GM Big Block Exhaust Manifold | Barr Marine MC-1-47735Port side log style manifold fits Mercruiser 325, 330, 350, 370, & 400 model marine engines. Mercruiser GM Big Block Exhaust Manifold Barr Marine MC 1 47735 Barr Mercruiser exhaust manifold Direct replacement Mercruiser GM V8 big block log style exhaust manifold Port side For Mercruiser 325, 330, 350, 255, 370 and 400 models Includes gaskets and mounting hardware Heavy duty cast iron Painted black Replaces Barr MC1 47735 Replaces Mercruiser 47735A17,