Westport Announces Fourth Quarter and Year End Fiscal 2011 Conference Call for Wednesday, June 8, 2011

VANCOUVER, June 1, 2011 /PRNewswire/ - Westport Innovations Inc. (TSX:WPT/NASDAQ:WPRT), a global leader in alternative fuel, low-emissions transportation technologies, will disclose its fourth quarter and fiscal year 2011 financial results on Wednesday, June 8, 2011 before market open. To coincide with the disclosure, Westport has scheduled a conference call for Wednesday, June 8, 2011 at 8:00 am Pacific Time (11:00 am Eastern Time).

Live Conference Call & Webcast

The public is invited to listen to the conference call in real time by telephone or webcast. To access the conference call by telephone, please dial: 1-800-319-4610 (Canada & USA toll-free) or 604-638-5340. The live webcast of the conference call can be accessed through the Westport website at www.westport.com/investors.

Replay Conference Call & Webcast

To access the conference call replay, please dial 1-800-319-6413 (Canada & USA toll-free) or 604-638-9010 using the pass code 1847. The replay will be available until June 22, 2011. Shortly after the conference call, the webcast will be archived on the Company's website and replay will be available in streaming audio.

About Westport Innovations Inc.

Westport Innovations Inc. is 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. Our unique technologies reduce nitrogen oxides (NOx), particulate matter (PM), and greenhouse gas emissions (GHG) while preserving the power, torque, and fuel efficiency of diesel engines. The Company focuses on three distinct categories or target markets - light-, medium-, and heavy-duty - through Westport business units or joint ventures. Juniper Engines is focused on 2.4L engines for industrial applications such as forklifts, oilfield service engines and light-duty automotive. Cummins Westport (CWI), a joint venture with Cummins, sells the world's broadest range of low-emissions alternative fuel engines for commercial urban fleets such as buses, refuse trucks and vocational vehicles. Westport Heavy Duty (Westport HD), our proprietary development platform, is engaged in the engineering, design and marketing of natural gas-enabling technology for the heavy-duty diesel engine and truck market. To learn more about our business, visit our website or subscribe to our RSS feed at www.westport.com, or follow us on Twitter @WestportWPRT.

SOURCE Westport Innovations Inc.