Cummins Westport Launches L Gas Plus Engine at WasteExpo.

Business Editors/Automotive Writers

WasteExpo

VANCOUVER, British Columbia--(BUSINESS WIRE)--May 17, 2004

Cummins Westport, Inc. (CWI) (TSX:WPT), announced today that its high-performance low-emissions L Gas Plus natural gas engine will be launched May 17, 2004 in Dallas, Texas at WasteExpo, the largest solid waste and recycling tradeshow in North America.

The Cummins Westport L Gas Plus combines the environmental advantages of clean-burning natural gas engines with more than enough power and torque for heavy duty refuse trucks, municipal works trucks, medium duty trucks and transit bus applications. In addition, the L Gas Plus has a variable geometry turbocharger that provides impressive low-end torque and transient response. Its industry-leading power-to-weight ratio delivers superior efficiency in many applications.

The L Gas Plus is the latest addition to the Cummins Westport family of "Plus" engines, joining the B and C Gas Plus. The L Gas Plus uses Lean Burn Spark Ignition combustion technology with an oxidation catalyst. Cummins Westport announced its first order for this engine in July 2003, with an order for 200 articulated buses, with a further option of 400, for the Metropolitan Transportation Authority of Los Angeles County.

At 8.9 liters, the L Gas Plus offers best-in-class power-to-weight ratio with 320 horsepower (hp) at 2300 revolutions per minute (rpm) and 1000 lb-ft at 1400 rpm weighing in at only 1500 lbs. Along with high performance, the L Gas Plus offers the best-in-class emissions at 1.4 grams per brake horsepower hour of oxides of nitrogen (g/bhp-hr NOx) plus non-methane hydrocarbon (NMHC) and 0.01 g/bhp-hr particulate matter (PM). Relative to the levels required under current US EPA standards, the L Gas Plus produces 40% less NOx + NMHC emissions and 90% less PM emissions.

"The L Gas Plus is the perfect complement to the Cummins Westport product line and we are excited to offer our customers a product with the power required to take on their heavy duty needs above 280 horsepower," said Hugh Foden, President of Cummins Westport. "The L Gas Plus offers the cleanliness and cost effectiveness of natural gas without compromising performance."

Cummins Westport Inc., a joint venture of Cummins Inc. (NYSE:CMI) and Westport Innovations Inc. (TSX:WPT), develops and markets low-emissions, alternative fuel engines manufactured by Cummins. Cummins is a global power leader in engines, electrical power generation systems and related technologies. Westport Innovations is the leading developer of clean natural gas- and hydrogen-fueled engines.

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.