Dr. Sandeep Munshi, Westport's Senior Scientist and Manager - Hydrogen Technologies, presented results of the demonstration at the Society of Automotive Engineers' Powertrain & Fluid Systems Conference & Exhibition in Tampa, Florida. "The buses have now completed 24,000 miles (39,000 km) on the road and HCNG technology has successfully proven itself in a commercially-available heavy-duty engine in a real life application," said Dr. Munshi. "We are very pleased to have achieved our goals in this program. We were able to demonstrate that hydrogen-enriched CNG could offer a viable path, using readily-available commercial vehicles, towards the eventual goal of pure hydrogen fuel, and that this approach offers immediate and material environmental benefits over even the best commercial environmental solution today, which is natural gas."

Dr. Michael Gallagher, Westport's Chief Operating Officer added, "As cities begin to develop their hydrogen infrastructure, such as Fuel Cells Canada's work on the Hydrogen Highway here in British Columbia, as well as California's equivalent, we expect HCNG buses and trucks will offer an excellent way to develop critical mass for fueling infrastructure while allowing fleets the flexibility to revert to CNG-only operation as fuel availability dictates. This experience could be a significant first step in moving towards hydrogen-based transportation in the future. We thank SunLine Transit Agency for hosting this program and congratulate them on their leadership in clean transportation solutions."

Westport and Cummins Westport calibrated two 230 hp Cummins Westport B Gas Plus engines to run on HCNG for SunLine Transit Agency of Palm Springs, California. Hydrogen Components Inc. of Littleton, Colorado, which led the previous engine tests on hydrogen-natural gas blends, was an advisory member of the project and funding was provided by The US Department of Energy's National Renewable Energy Laboratory and South Coast Air Quality Management District.

Westport recently announced a demonstration of up to five HCNG-fuelled transit buses in Vancouver, which will operate under the Hydrogen Highway initiative. Westport is also working with China's Tsinghua University to co-research and demonstrate technologies using HCNG in public bus fleets in Beijing and other Chinese cities.

Westport Innovations Inc. is a leading developer of gaseous fuel engine technologies. Its joint venture with Cummins Inc., Cummins Westport Inc., manufactures and sells a wide range of engines for commercial transportation applications such as trucks and buses. Westport has technology development alliances in place with a number of leading engine manufacturers, including Ford, MAN, Isuzu, and BMW to develop engines that operate using cleaner-burning fuels such as natural gas, propane, hydrogen and blended fuels such as HCNG.

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

     Westport Innovations Inc.
     Gordon Neal
     Director, Investor Relations & Communications
     (604) 718-2046
     Email: invest@westport.com
     Website: www.westport.com