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Westport Innovations Inc. Offers Common Shares

                Westport Innovations Inc. Offers Common Shares

PR Newswire

VANCOUVER, Sept. 25, 2013

VANCOUVER, Sept. 25, 2013 /PRNewswire/ - Westport Innovations Inc. (TSX:WPT /
NASDAQ:WPRT) announced today that it is offering to sell, subject to market
and other conditions, 6,000,000 of its common shares in the United States and
Canada pursuant to a preliminary prospectus supplement to its base shelf
prospectus originally dated June 20, 2013. Copies of the U.S. preliminary
prospectus supplement can be accessed through the SEC's website at
www.sec.gov, and copies of the Canadian preliminary prospectus supplement are
available at www.sedar.com.

Morgan Stanley, Jefferies, and Deutsche Bank Securities are the joint
bookrunners for the offering. Other underwriters include RBC Capital Markets,
Lake Street Capital Markets, and Craig-Hallum Capital Group. The common shares
issued under the offering will be listed on The NASDAQ Global Select Market.
Westport has applied to the Toronto Stock Exchange for the additional listing
of the common shares issued under the offering, which listing will be subject
to fulfillment of all of the listing requirements of the exchange.

The offering will be made only by means of Westport's preliminary prospectus
supplement and accompanying short form base shelf prospectus. Copies of the
United States preliminary prospectus supplement, when available, may be
obtained from: Morgan Stanley & Co. LLC, Attention: Prospectus Department, 180
Varick Street, 2nd Floor, New York, NY 10014; Jefferies LLC, Attention: Equity
Syndicate Prospectus Department, 520 Madison Avenue, 12th Floor, New York, NY,
10022, or by telephone at 877-547-6340 (toll free), or by email at
Prospectus_Department@Jefferies.com; Deutsche Bank Securities Inc., Attention:
Prospectus Group, 60 Wall Street, New York, NY 10005, or by telephone at
800-503-4611 or by email at prospectus.cpdg@db.com; or RBC Capital Markets,
LLC, 3 World Financial Center, 200 Vesey Street, 8^th Floor, New York, NY
10281-8098, Attention: Equity Syndicate, or by telephone at 877-822-4089.

Copies of the Canadian preliminary prospectus supplement, when available, may
be obtained by contacting Morgan Stanley Canada Limited, 181 Bay Street, Suite
3700, Toronto, Ontario M5J 2T3; or RBC Dominion Securities Inc., RBC
Wellington Square, 8^th Floor, 180 Wellington Street W., Toronto, Ontario M5J
0C2, Attention: Distribution Centre, or by telephone at 416-842-5349.

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.

Note: This document contains forward-looking statements about Westport's
planned public offering in the United States and Canada; listing on The NASDAQ
Global Select Market and the Toronto Stock Exchange 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 Select Market or the Toronto
Stock Exchange. Consequently, you 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.

SOURCE Westport Innovations Inc.

Contact:

Inquiries:
Darren Seed
Vice President, Investor Relations & Communications
Westport Innovations Inc.
T 604-718-2046
invest@westport.com

Media Inquiries:
Nicole Adams
Director, Communications
Westport
T: 604-718-2011
media@westport.com