1469445 Manifold-Exh Fits Caterpillar ModelsOne New Aftermarket Replacement Exhaust Manifold for Caterpillar (Cat) 3406E, C15, and C16 Diesel Engines This three piece cast iron exhaust manifold collects combustion gases from all six cylinders and routes them to the turbocharger in Caterpillar 3406E, C15, and C16 heavy duty diesel engines. The three section design two end sections and a center section allows for thermal expansion and contraction during heat cycles, reducing stress on the