LOUISVILLE, KY. (March 21, 2012) -

Cummins Westport Inc. announced today that the Cummins Westport ISX12 G, a 12-liter heavy-duty, factory-built, dedicated natural gas engine for regional-haul, truck/tractor, vocational and refuse applications will be officially unveiled in the Cummins booth at the Mid-America Trucking Show (MATS) in Louisville on March 22, 2012.

The ISX12 G natural gas engine is based on the Cummins ISX12 diesel engine platform, the newest member of Cummins Heavy-Duty engine family. The ISX12 G will operate exclusively on natural gas, and fuel can be carried on the vehicle as either compressed natural gas (CNG) or liquefied natural gas (LNG), utilizing Cummins Westport’s proprietary spark-ignited, Stoichiometric cooled Exhaust Gas Recirculation (SEGR) technology, first introduced with the 8.9-liter ISL G.

The ISX12 G also features Three-Way Catalyst (TWC) aftertreatment, which is packaged as a muffler and is maintenance-free. No Diesel Particulate Filter (DPF) or Selective Catalytic Reduction (SCR) aftertreatment will be required.

A range of five ratings, from 330 hp to 400 hp (246-298 kW) and 1150 to 1450 lb-ft (1559-1966 N•m) torque will be offered at launch. Field-testing is under way, with production expected to begin in early 2013. The ISX12 G will also be the first engine from Cummins Westport to offer optional engine brake capability and will also offer customers the choice between manual and automatic transmissions.

The ISX12 G will be manufactured in Cummins Heavy-Duty Engine Plant in Jamestown, N.Y., and will be backed by a Cummins base warranty (2 years, 250,000 miles; 6,250 hours of operation). Extended coverage options will be released closer to production. Service, parts and training support will be delivered by the Cummins service network.

“This is an important product development for Cummins Westport, given the increasing demand for natural gas vehicles in the heavy-duty market,” said Jim Arthurs, President – Cummins Westport. “The ISX12 G will offer customers heavy-duty performance, reliability and durability and a choice of either compressed natural gas or liquefied natural gas as a fuel.”

The ISX12 G target markets at launch are North American regional-haul and vocational truck/tractor, and refuse applications, where demand for natural gas vehicles is growing. Anticipated end-use applications in the regional-haul market segment include intermodal and distribution operation and pickup-and-delivery. Potential postlaunch market opportunities include motorcoach and specialty vocational applications.

The ISX12 G is expected to be certified at launch to meet the U.S. Environmental Protection Agency (EPA) and California Air Resources Board (ARB) emissions standards of 0.20-g/bhp-hr oxides of nitrogen (NOx) and 0.01-g/bhp-hr Particulate Matter (PM). The engine is additionally expected to be capable of meeting Euro VI and pending U.S. greenhouse gas and fuel economy regulations.

Partial funding in support of the ISX12 G engine development has been received from the U.S. Department of Energy’s (DOE’s) National Renewable Energy Laboratory (NREL), in partnership with the California Energy Commission and the South Coast Air Quality Management District, and the California Energy Commission in conjunction with the Gas Technology Institute.

About Cummins Westport Inc.
Cummins Westport Inc. designs, engineers and markets spark-ignited natural gas engines for North American transportation applications such as trucks and buses. Cummins Westport is a joint venture of Cummins Inc. (NYSE:CMI), a corporation of complementary business units that design, manufacture, distribute and service engines and related technologies, including fuel systems, controls, air handling, filtration, emission solutions and electrical power generation systems, and Westport Innovations Inc. (NASDAQ: WPRT/TSX: WPT), a global leader in alternative fuel, low-emissions technologies that allow engines to operate on clean-burning fuels such as compressed natural gas (CNG), liquefied natural gas (LNG), hydrogen and biofuels such as landfill gas. www.cumminswestport.com.

Note: This document contains forward-looking statements about Cummins Westport’s business, operations, markets, technology development, timing and specifics relating to the launch of the ISX12 G and its certifications and uses, warranty terms for the ISX12 G, end use applications, market opportunities and to the environment in which Cummins Westport operates, which are based on Cummins Westport’s estimates, forecasts and projections.

These statements are not guarantees of future performance and involve known and unknown risks and uncertainties that are difficult to predict, or are beyond Cummins Westport’s control and are based on assumptions that may cause our actual results, levels of performance, activity or achievement to be materially different from that implied by these forward-looking statements. These risks, uncertainties and assumptions include those relating to our industry and products, technological development, demand for natural gas vehicles as well as other risk factors and assumptions. 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. The contents of any web site referenced in this press release are not incorporated herein by reference.