Exhaust treatment system for an internal combustion engine

An internal combustion engine having an exhaust system configured to receive exhaust gas therefrom comprising:

• an exhaust driven turbocharger, in fluid communication with the exhaust system, for receipt of exhaust gas from the internal combustion engine, and having an outlet and a flanged portion that extends about the outlet;
• an exhaust treatment device comprising a rigid canister having an inlet cone that includes an integral inlet flange defining an inlet opening of the exhaust treatment device and configured to define a seal with the flanged portion that extends about the outlet of the exhaust driven turbocharger for receipt of exhaust gas therefrom;
• a catalyst coated substrate disposed within the rigid canister through which the exhaust gas flows;
• an exhaust gas passage, defined by the turbocharger outlet and the inlet opening of the exhaust treatment device, that fluidly couples the exhaust driven turbocharger and the exhaust treatment device and allows for the passage of exhaust gas therebetween;
• and
• a flow modifier comprising a radially inwardly extending wall portion that extends from an inner wall of the exhaust gas passage and directs the exhaust gas away from an outer radius of the exhaust gas passage as exhaust gas enters the inlet cone of the exhaust treatment device to evenly distribute the exhaust gas across the an inlet face of the catalyst coated substrate.