News Releases

Published: July 22, 2008

Westport Innovations Inc. Files U.S. IPO Registration Statement with SEC in Connection with NASDAQ Listing Application and Effects Share Consolidation

VANCOUVER, BC – Westport Innovations Inc. (TSX:WPT), a global leader in alternative fuel, low-emissions transportation technologies, announced today that it has filed a registration statement on Form F-10 with the U.S. Securities and Exchange Commission concurrently with a short-form prospectus in Canada in connection with its planned initial public offering of common shares in the United States. The common shares are being concurrently offered in Canada under the short-form prospectus. Copies of the registration statement can be accessed through the SEC’s website at www.sec.gov, and copies of the Canadian short-form prospectus are available at www.sedar.com.

In connection with the planned offering and application to list its common shares on The NASDAQ Global Market, Westport effected a three and one-half-to-one (3.5:1) share consolidation of its issued and outstanding common shares on July 21, 2008. The share consolidation was previously approved by shareholders at Westport’s Annual General Meeting on July 8, 2008. All fractional shares were rounded down to the nearest whole share. Westport common shares are expected to trade on the TSX on a post-consolidated basis beginning at the open of market on July 24, 2008. Listing of the common shares on NASDAQ will be subject to Westport fulfilling all applicable listing requirements.

Jefferies & Company, Inc. is the sole book-running manager for the offering. Lazard Capital Markets LLC is acting as co-lead manager and other underwriters include ThinkPanmure, LLC in the United States and Canaccord Capital Corporation and National Bank Financial Inc. in Canada.

A registration statement relating to these securities has been filed with the Securities and Exchange Commission but has not yet become effective. These securities may not be sold nor may offers to buy be accepted prior to the time the registration statement becomes effective. This press release shall not constitute an offer to sell or the solicitation of an offer to buy, nor shall there be any sale of the common shares of Westport in any jurisdiction in which such offer, solicitation or sale would be unlawful prior to registration or qualification under the securities laws of any such jurisdiction. No offer to buy the securities can be accepted and no part of the purchase price can be received until the registration statement has become effective, and any such offer may be withdrawn or revoked, without obligation or commitment of any kind, at any time prior to notice of its acceptance given after the effective date.

The offering will be made only by means of a prospectus. Copies of the United States preliminary prospectus, when available, may be obtained from: Jefferies & Company, Inc., Equity Capital Markets, at 520 Madison Avenue, New York, NY, 10022, and by phone at (212) 284-2342 or 1-(888)-449-2342 or by fax request at (212) 284-2208, Lazard Capital Markets LLC at 30 Rockefeller Plaza, New York, NY, 10020 and by telephone at (212) 632-6717 or by fax request at (212) 632-6984; and ThinkPanmure, LLC at 600 Montgomery St 3rd. Floor, San Francisco, CA 94111, and by telephone at (415) 249-2935 or by fax request at (415) 772-9976.

Copies of the Canadian preliminary prospectus, when available, may be obtained from Canaccord Capital Corporation at161 Bay Street, Suite 3000, P.O. Box 516 Toronto, ON. M5J 2S1, and by phone at (416) 869-3052 or by fax request at (416) 869-7706; and National Bank Financial Inc. at 1155 Metcalfe Street, 5th Floor, Montreal, QC. H3B 4S9 and by phone at (514) 879-2465 or by fax request at (514) 879-7830.

About Westport

Westport, a division of Westport Fuel Systems Inc., engineers the world’s most advanced natural gas engines and vehicles. We work with original equipment manufacturers worldwide from design through to production, creating products to meet the growing demand for vehicle technology that will reduce both emissions and fuel costs. To learn more about our business, visit www.westport.com, subscribe to our RSS feed, or follow us on Twitter @WestportDotCom

Cautionary Note Regarding Forward Looking Statements

This document contains forward-looking statements, including statements regarding the demand for our products, the future success of our business and technology strategies, investment, cash and capital requirements, intentions of partners and potential customers, the performance and competitiveness of our products and expansion of product coverage, future market opportunities, speed of adoption of natural gas for transportation, growth in demand as a result of new emission standards and terms of future agreements. These statements are neither promises nor guarantees, but involve known and unknown risks and uncertainties and are based on assumptions that may cause our actual results, levels of activity, performance or achievements to be materially different from any future results, levels of activities, performance or achievements expressed in or implied by these forward looking statements. These risks and assumptions include risks and assumptions related to our revenue growth, operating results, industry and products, the general economy, conditions of and access to the capital and debt markets, governmental policies and regulation, technology innovations, fluctuations in foreign exchange rates, global government stimulus packages, the acceptance of natural gas vehicles in fleet markets, the relaxation or waiver of fuel emission standards, the inability of fleets to access capital or government funding to purchase natural gas vehicles, the sufficiency of bio methane for use in our vehicles, the development of competing technologies as well as other risk factors and assumptions that may affect our actual results, performance or achievements or financial position discussed in our most recent Annual Information Form and other filings with securities regulators. Readers should not place undue reliance on any such forward-looking statements, which speak only as of the date they were made. We disclaim any obligation to publicly update or revise such statements to reflect any change in our expectations or in events, conditions or circumstances on which any such statements may be based, or that may affect the likelihood that actual results will differ from those set forth in the forward looking statements except as required by National Instrument 51-102.

More Information

Westport Fuel Systems
(Investor Inquiries)

Shawn Severson
Investor Relations
T 604-718-2046
invest@wfsinc.com
www.wfsinc.com

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