"This agreement does more than pair two leaders in their respective industries," said Steve Fisher, vice president of Caterpillar's Large Power Systems Division. "Many of our customers are asking for natural-gas powered equipment in order to reap the financial and environmental benefits. The program positions Caterpillar to become the first manufacturer to bring Westport HPDI technology to the high horsepower off-road market, offer the broadest product line of natural gas-fueled machines and equipment, and capitalize on the attractiveness of natural gas as an alternate mobile fuel - all within the shortest time frame for our customers.""This is a true win-win for our customers and the environment," said Billy Ainsworth, President and CEO of Electro-Motive Diesel, a subsidiary of Progress Rail Services, which will develop the natural gas-powered locomotives. "As a part of Caterpillar, we have the ability to be on the forefront of developing cutting-edge solutions for our industry, and we look forward to continuing those advancements for years to come." Development programs will start immediately for both new and existing engines, combustion technology and fuel systems. Commercial production is expected to begin in about five years. Video Link for Executive Statements: http://www.westport.com/news/2012/westport-and-caterpillar-natural-gas-technology-agreement David Demers, CEO, Westport Innovations Steve Fisher, Vice President of Caterpillar's Large Power Systems Division Billy Ainsworth, President and CEO of Electro-Motive Diesel, a subsidiary of Progress Rail Services About Caterpillar: For more than 85 years, Caterpillar Inc. has been making sustainable progress possible and driving positive change on every continent. With 2011 sales and revenues of $60.138 billion, Caterpillar is the world's leading manufacturer of construction and mining equipment, diesel and natural gas engines, industrial gas turbines and diesel-electric locomotives. The company also is a leading services provider through Caterpillar Financial Services, Caterpillar Remanufacturing Services, Caterpillar Logistics Services and Progress Rail Services. More information is available at: http://www.caterpillar.com. About EMD: Founded in 1922, Electro-Motive Diesel, a subsidiary of Progress Rail Services, a Caterpillar Company, is an original equipment manufacturer of diesel-electric locomotives. Headquartered in LaGrange, Illinois, with additional manufacturing facilities and business offices around the world, EMD designs, manufactures and sells diesel-electric locomotives for all commercial railroad applications and has sold its products in more than 70 countries worldwide. The Company is the only diesel-electric locomotive manufacturer to have produced more than 72,500 engines and has the largest installed base in both North America and worldwide. In addition to its manufacturing activities, EMD has an extensive aftermarket business offering customers replacement parts, maintenance solutions, and a range of value-added services. The Company is also a global provider of diesel engines for marine propulsion, offshore and land-based oil well drilling rigs, and stationary power generation. Additional information may be found at www.EMDiesels.com. 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 renewable natural gas (RNG) fuels such as landfill gas and helps reduce greenhouse gas emissions (GHG). Westport technology offers advanced LNG fueling systems with direct injection natural gas engine technology for heavy-duty vehicles such as highway trucks and off-road applications such as mining and rail. Westport's joint venture with Cummins Inc., Cummins Westport Inc. designs, engineers and markets spark-ignited natural gas engines for North American transportation applications such as trucks and buses. Westport LD division is one of the global leaders for natural gas and liquefied petroleum gas (LPG) fuel in passenger cars, light-duty trucks and industrial applications such as forklifts. To learn more about our business, visit our website or subscribe to our RSS feed at www.westport.com, or follow us on Twitter @WestportDotCom. Forward- looking Information Disclaimer Note: This document contains forward-looking statements. Forward-looking information is typically identified by words such as "anticipate", "estimate", "expect", "forecast", "may", "will", "could", "plan", "intend", "should", "believe", "outlook", "project", "potential", "target" and similar words suggesting future events or future performance. In particular, this press release contains forward-looking information which includes statements regarding the future role of Westport in the supply of key components, timing of production and commencement of development programs, demand for our products, the future success of our business and technology strategies, intentions of partners and potential customers, the performance and competitiveness of our products and expansion of product coverage and future market opportunities. 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