December 5, 2012 - With universal system design that fosters OEM integration, Westport™ LNG Tank System provides on-board storage solution for vehicles using liquefied natural gas (LNG). Single-tank, 120 or 150 gal capacity single-tank systems can run for 350 or 450 miles, respectively, on cold (unsaturated) LNG fuel and are capable of carrying both cold and warm LNG. Driver display indicates LNG fuel levels as well as status and diagnostic information about tank and integrated pumps.

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Westport Manufacturing Ltd
1122 S.W. Marine Dr.
Vancouver, BC, V5P5Z3, USA

~New System Improves Performance, Extends Range and Reduces Costs,  Begins Shipping by mid-2013 ~

VANCOUVER - Westport Innovations Inc. (TSX:WPT)  (NASDAQ:WPRT), the global leader in natural gas engines, today  announced a unique on-board storage solution that provides best in  class performance for vehicles using liquefied natural gas (LNG). The  new Westport(TM) LNG Tank System, will be available in 120 and 150 gallon  capacities, is optimized for spark ignited (SI) engines and begins  shipping by mid-2013. The Westport LNG Tank System features proprietary  Westport technology and is expected to provide customers with the  ability to fuel even the largest SI engines on a single tank and  deliver extended range.

Key characteristics of the new Westport LNG Tank System:

--  Current industry standard systems require two LNG tanks to operate effectively with larger SI engines and require warm (saturated) LNG. The Westport LNG Tank System is optimized for trucks running even the largest SI engines, reducing the overall fuel system costs and weight dramatically with the single-tank option.
--  The 120 gallon or 150 gallon single-tank systems can run for approximately 350 to 450 miles, respectively, on cold (unsaturated) LNG fuel. Those ranges double for dual-tank configurations.
--  Fuel-flexibility with the ability to carry both cold and warm LNG.
--  By carrying fuel as cold LNG, the Westport LNG Tank System can increase fuel storage times and improve vehicle range by up to 10 percent.
--  Universal system design allows for any original equipment manufacturer (OEM) to integrate.
--  Compared to existing compressed natural gas (CNG) options, a single 150 gallon Westport LNG Tank System takes the place of three standard CNG tanks, lowering fuel storage costs and reducing overall vehicle weight by approximately 600 lbs. Additionally, LNG has shorter refuelling times compared to CNG.
--  Customers receive a two year / 250,000 mile warranty along with access to field service from Westport-trained personnel.
--  Westport Active System Management features proprietary control algorithms and connects with standard engine controllers to allow fuel delivery to match driving patterns.
--  An advanced driver display that indicates not only the LNG fuel levels, but also status and diagnostic information about the tank and integrated pumps.
--  Fleets with a combination of SI and Westport(TM) HPDI trucks can now rely on the same LNG refuelling infrastructure due to the system's fuel-flexible capabilities.

"Our early production systems tested with the Cummins Westport ISX12 G  in a Peterbilt 384 truck have proven to have excellent performance  characteristics and superior operating results on a single tank," said  Steve Anderson, Westport HD Vice President of Business Development. "We  believe this is the only on-board fuel system for LNG-fueled engines  that can operate on a single tank using range-extending cold LNG."

"Thanks to the flexibility and range of the Westport LNG Tank System,  fleet operators can now use the same cold LNG and technology across  their fleet in a range of vehicle and engine sizes," said Anderson.

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 @WestportWPRT.

Westport Innovations Inc.

CONTACT: Investor Inquiries:
Darren Seed
Vice President, Investor Relations & Communications  Westport Innovations Inc.
Phone: 604-718-2046
Email: invest@westport.com

Media Enquiries:
Nicole Adams
Director, Communications
Westport Innovations Inc.
Phone: 604-718-2011
Email: media@westport.com

Contacts: View detailed contact information.