Cummins Westport Inc.

Cummins Westport Inc.
Westport Innovations Inc.

Westport Innovations Inc.

May 03, 2005 13:30 ET

Cummins Westport Receives National Partner of the Year Award from U.S. Clean Cities Program


NEWS RELEASE TRANSMITTED BY CCNMatthews

FOR: CUMMINS WESTPORT INC.

AND WESTPORT INNOVATIONS INC.

TSX SYMBOL: WPT

MAY 3, 2005 - 13:30 ET

Cummins Westport Receives National Partner of the Year
Award from U.S. Clean Cities Program

VANCOUVER, BRITISH COLUMBIA--(CCNMatthews - May 3, 2005) - Cummins
Westport today announced that it has received the National Partner of
the Year Award from the U.S. Department of Energy's (DOE) Clean Cities
Program. The award recognizes Cummins Westport's leadership in
alternative fuel engine development and deployment.

Cummins Westport was nominated by an independent panel made up of DOE,
Clean Cities Program, and industry representation. The mission of the
Clean Cities Program is to advance the United States' economic and
environmental performance and energy security, by supporting local
decisions that contribute to the reduction of petroleum consumption.
Nearly 90 Clean Cities coalitions across the United States work to
develop markets for vehicles powered by alternatives to conventional
gasoline and diesel fuels, as well as for other petroleum reduction
technologies.

"It is a great honor to be recognized by the US Department of Energy for
Cummins Westport's efforts to provide alternative fuel engines to
improve our environment," said Cummins Westport President Guan Saw. "We
are very proud of our products. This award recognizes our commitment to
helping solve emissions challenges posed by transportation, while at the
same time providing the performance, reliability, and durability that
customers demand."

Saw highlighted Cummins Westport's next-generation 8.9 litre natural gas
engine development program as evidence of the company's committment to
improving natural gas engines. Important design parameters for the
engine will include improved fuel efficiency, reliability, lower total
ownership costs as well as a full range of ratings to meet customer and
manufacturer requirements. He reiterated that the new Cummins Westport
natural gas engine will meet 2010 emissions standards for oxides of
nitrogen (NOx) of 0.2 g/bhp-hr and 0.01 g/bhp-hr of particulate matter
at its launch in 2007.

Cummins Westport Inc., a joint venture of Cummins Inc. (NYSE:CMI) and
Westport Innovations Inc. (TSX:WPT), manufactures and sells the world's
widest range of low-emissions alternative fuel engines for commercial
transportation applications, such as trucks and buses. Cummins is a
global power leader in engines, electrical power generation systems, and
related technologies. Westport Innovations is the leading developer of
technologies that allow engines to operate on clean-burning fuels such
as natural gas, hydrogen, and hydrogen-enriched natural gas (HCNG).

Note: This document contains forward-looking statements about Cummins
Westport's business, operations, technology development, or to the
environment in which it operates, which are based on Cummins 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 Cummins 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. Cummins 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.

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