Westport Named Fourth Fastest Growing Technology Company in Canada by Deloitte; Third Fastest Growing Company in BC by Business in Vancouver

VANCOUVER, British Columbia--Sept. 30, 2005--Westport Innovations Inc. (TSX:WPT) was named fourth to Deloitte's Canadian Technology Fast 50, the annual program that recognizes excellence, innovation, and the fastest growing tech companies in Canada. Westport was also recognized by Business in Vancouver at a separate ceremony as the third fastest growing of all BC companies.

"Making Deloitte's Technology Fast 50 is a testament to a company's vision that has resulted in exceptional growth over five years. Westport Innovations' leadership team has the right stuff for growth, and Deloitte salutes their accomplishments," said Garry Foster, National Director, Technology, Media & Telecommunications, Deloitte.

David Demers, Westport's CEO, said, "We are honoured to again this year be included in both the Technology Fast 50, and on Business in Vancouver's Fastest Growing BC Companies list. We are committed to our vision of a better world through innovative technology, and we expect continued growth as people recognize the economic and environmental advantages of our transportation solutions."

Winners of the 15 regional Technology Fast 50 programs in the United States and Canada are automatically entered in the Deloitte Technology Fast 500 program, which ranks North America's top 500 fastest growing technology companies. For more information on the Fast 50 or Fast 500 programs visit www.fast50.ca or www.fast500.com.

About Westport Innovations Inc.

Westport Innovations Inc. is the leading developer of environmental technologies that allow engines to operate on clean-burning fuels such as natural gas, hydrogen, and hydrogen-enriched natural gas (HCNG). Westport has technology development alliances in place with Cummins, Ford, MAN, BMW, and Isuzu, as well as an ownership interest in Clean Energy, the largest provider of natural gas for vehicles in North America. Cummins Westport Inc., Westport's joint venture with Cummins Inc., manufactures and sells the world's widest range of low-emissions alternative fuel engines for commercial transportation applications such as trucks and buses. www.westport.com

Note: This document contains forward-looking statements about Westport's business, operations, technology development or to the environment in which it operates, which are based on Westport's estimates, forecasts and projections. These statements are not guarantees of future performance and involve risks and uncertainties that are difficult to predict, or are beyond Westport's control. Consequently, readers should not place any undue reliance on such forward-looking statements. In addition, these forward-looking statements relate to the date on which they are made. Westport disclaims any intention or obligation to update or revise any forward-looking statements, whether as a result of new information, future events or otherwise.