Abstract: Exemplary embodiments of the present invention provide devices, systems and methods for distribution of an engine exhaust gas to one or more exhaust treatment devices. In one embodiment, an exhaust flow diffuser is provided including a conduit defining an inlet opening, an outlet opening and a flow path therebetween. The conduit includes a first section disposed proximate to the inlet opening and a second section disposed proximate to the outlet opening. The second section has an increasing diameter along its length. The conduit is formed by a first member and a second member both of which extend between the inlet opening and outlet opening to form a portion of the first section and the second section. The first member and the second member each include an engagement feature that extends between the inlet opening and outlet opening.

Abstract: An elongate, shallow, rectangular duct is formed in a vehicle hood by structure depending from an inner surface thereof, the hood inner surface forming a top surface of the duct. The rectangular duct includes a forward ambient air inlet and a rear air outlet and incorporates a series of baffles strategically located between the two for eliminating moisture from air flowing therebetween. A sealing sleeve disposed in the duct outlet to engage the engine air cleaner is provided within the duct with an internal passage having a bellmouth nozzle entrance section to the outlet and an external surface having a third baffle section thereon within the duct. The portion of the sleeve external of the duct includes a bellows section to accommodate variations in the position of the air cleaner inlet.