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Exhibit 21.1

Power Solutions International, Inc.

and Consolidated Subsidiaries

100% Owned Subsidiaries of the Registrant

Name						Jurisdiction of Organization
Professional Power Products, Inc						An Illinois Corporation
Bi-Phase Technologies, LLC						A Minnesota Limited Liability Company
Powertrain Integration Acquisition, LLC						An Illinois Limited Liability Company
The W Group, Inc.						A Delaware Corporation

*Corporate joint ventures not shown by name in the above listing, if considered in the aggregate as a single subsidiary, would not constitute a significant subsidiary.

100% Owned Subsidiaries of The W Group, Inc.

Name						Jurisdiction of Organization
Power Great Lakes, Inc.						An Illinois Corporation
PSI International, LLC						An Illinois Limited Liability Company