Mr. Darren Seed reports

WESTPORT ANNOUNCES FIRST QUARTER CALENDAR 2012 CONFERENCE CALL FOR TUESDAY, MAY 8, 2012

Westport Innovations Inc. will release its financial results for the first quarter of calendar year 2012 ended March 31, 2012, on Tuesday, May 8, 2012, after market close. To coincide with such disclosure, Westport has scheduled a conference call for Tuesday, May 8, 2012, at 2 p.m. Pacific Time (5 p.m. Eastern Time).

Live conference call and 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 and the United States toll-free) or 604-638-5340. The live webcast of the conference call can be accessed through the Westport website.

Replay conference call and webcast

To access the conference call replay, please dial 1-800-319-6413 (Canada and the United States toll-free) or 604-638-9010 using the passcode 1847. The replay will be available until May 15, 2012. Shortly after the conference call, the webcast will be archived on the company's website and replay will be available in streaming audio.