Exhaust aftertreatment system

A method of treating exhaust of an engine, comprising:

• receiving separate entering exhaust streams from an engine;
• flowing the separate entering exhaust streams through two or more first exhaust treatment devices in a first direction;
• merging the separate exhaust streams into a merged exhaust stream;
• flowing the merged exhaust stream a second direction that is approximately 180 degrees from the first direction;
• dividing the merged exhaust stream into two or more separate exiting exhaust streams;
• receiving the two or more separate exiting exhaust streams;
• and
• flowing the two or more separate exiting exhaust streams through two or more second exhaust treatment devices in a third direction approximately 90 degrees from the second direction.

A power system, comprising:

• an engine;
• an exhaust treatment system;
• the exhaust treatment system configured with:
• a housing defining two or more inlets configured to receive separate entering exhaust streams from an engine;
• two or more first exhaust treatment devices disposed within the housing, each configured to receive one of the separate entering exhaust streams, wherein the separate entering exhaust streams flow through the two or more first exhaust treatment devices in a first direction;
• two or more redirecting flow passages configured to combine the separate exhaust streams into a merged exhaust stream that flows in a second direction about 180 degrees from the first direction;
• an intermediate flow region configured to divide the merged exhaust stream into two or more separate exiting exhaust streams;
• and
• two or more second exhaust treatment devices disposed within the housing, each configured to receive one of the separate exiting exhaust streams from the intermediate flow region, wherein the separate exiting exhaust streams flow through the two or more second exhaust treatment devices in a third direction about 90 degrees from the second direction.