Westport Innovations Inc. Files U.S. IPO Registration Statement With SEC in Connection With NASDAQ Listing Application

VANCOUVER, BRITISH COLUMBIA, Jul 22 (MARKET WIRE) --
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 at 161 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 Innovations Inc.

Westport Innovations Inc. is a leading global supplier of proprietary
solutions that allow engines to operate on clean-burning fuels such as
compressed natural gas (CNG), liquefied natural gas (LNG), hydrogen and
biofuels such as landfill gas. Cummins Westport Inc., Westport's joint
venture with Cummins Inc., manufactures and sells the world's broadest
range of low-emissions alternative fuel engines for commercial
transportation applications such as trucks and buses. BTIC Westport Inc.,
Westport's joint venture with Beijing Tianhai Industry Co. Ltd.,
manufactures and sells LNG fuel tanks for vehicles.

Note: This document contains forward-looking statements about Westport's
planned initial public offering in the United States and public offering
in Canada; planned listing on The NASDAQ Global Market; timing of trading
of its common shares on the TSX on a post consolidated basis; information
on Westport's business, operations, technology development or the
environment in which it operates, and expectations related to the
offering and listing. Forward-looking statements are based on Westport's
plans, estimates, forecasts and projections and are not guarantees of
future results or performance and involve risks and uncertainties that
are difficult to predict, or are beyond Westport's control, including
market conditions, investor expectations and business and operating
risks. There can be no assurance that Westport will complete the proposed
offering or that its common shares will be listed on The NASDAQ Global
Market. Consequently, you should not place any undue reliance on such
forward-looking statements.

Contacts:
Westport Innovations Inc.
Darren Seed
Director, Investor Relations
(604) 718-2046
Email: invest@westport.com
Website: www.westport.com

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