Tenneco Automotive Operating Company Inc.

Argun Yetkin

Adam J Kotrba

Timothy P Gardner

Guanyu Zheng

Jeremy D Popovich

An exhaust system for an engine having a plurality of combustion chambers includes a housing containing a first array of parallel positioned emission treatment devices and a second array of parallel positioned emission treatment devices axially spaced apart from one another. A first exhaust passageway is in fluid communication with the combustion chambers and contains the first array of emission treatment devices. A second and separate exhaust passageway is in fluid communication with the combustion chambers and contains the second array of emission treatment devices. A first valve restricts the exhaust flow through the first exhaust passageway. A second valve restricts the exhaust flow through the second exhaust passageway.

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Ann Arbor, MI, United States of America

Argun Yetkin