Photo Release -- Exa's Simulation Technology Critical to Achieving 75% Fuel Economy Improvement for Cummins, Peterbilt

Photo Release -- Exa's Simulation Technology Critical to Achieving 75% Fuel
Economy Improvement for Cummins, Peterbilt SuperTruck

BURLINGTON, Mass., March 21, 2014 (GLOBE NEWSWIRE) -- Exa® Corporation
(Nasdaq:EXA), a global innovator of fluids simulation solutions for product
engineering, stated that Cummins Inc. and Peterbilt Motors Company, the first
companies to announce their SuperTruck for the Department of Energy (DOE)
SuperTruck Program, credited Exa's technology and engineering expertise as
instrumental in the success of their recently announced vehicle. Exa worked
with engineers from both Cummins and Peterbilt to perform aerodynamic and
thermal simulations to achieve significant efficiency improvements throughout
the tractor, trailer and engine. These simulations, done long before a
physical prototype was ever created, helped this SuperTruck exceed the
required 50% efficiency improvement, and deliver a 75% more efficient truck —
ahead of schedule.

Photos accompanying this release are available at

http://www.globenewswire.com/newsroom/prs/?pkgid=24283

http://www.globenewswire.com/newsroom/prs/?pkgid=24282

The remarkable improvements were made possible through the collaboration of
two world-class companies. They evaluated the entire truck from the underhood
cooling requirements and engine housing, to every part of the tractor and
trailer. "It was not one aerodynamic or thermal simulation that made the
difference," stated David Koeberlein, Cummins' Program Lead for the SuperTruck
program. "Using Exa's simulations, we were able to rapidly find and address
areas of thermal and aerodynamic efficiency throughout the truck — it was a
critical resource for our SuperTruck team."

The project started with Cummins' engineers digitally packaging their new,
energy efficient engine, designed with a waste heat recovery system, into the
Peterbilt tractor CAD geometry. They then added heat exchangers, and simulated
the thermal performance of the complete system. "Exa's technology was able to
quickly demonstrate, through simulation alone, optimal cooling package
design," remarked Jon Dickson, Cummins Engineering Manager of Advanced Vehicle
Integration. "To package the new waste heat recovery condenser, we had to
redesign the vehicle heat exchanger system and use a non-traditional layout.
We were able to use Exa's PowerCOOL^® and PowerTHERM^® to identify areas to
improve thermal performance while maximizing aerodynamic efficiency — years
before any vehicle was built."

At the same time, Landon Sproull, Peterbilt Chief Engineer, and Rick Mihelic,
Peterbilt Manager of Vehicle Performance and Engineering Analysis, were
evaluating their tractor and trailer combinations for aerodynamic/thermal
performance. "Over the course of three years, we ran hundreds of simulations
to test and analyze every part of this truck using Exa PowerFLOW^®," stated
Mihelic. "We designed a complete new SuperTruck aerodynamic package which
included visible devices such as trailer skirts and wheel well covers as well
as unseen, but critical, underbody shields that optimize airflow and thermal
efficiency." Sproull added, "Using visualization of the simulation results,
our team analyzed each area looking for opportunities for improvement. Our
designers and engineers could easily review and discuss results and
optimization options — something simply not possible in a wind tunnel. It was
this comprehensive analysis that helped us to achieve our extreme efficiency
savings that exceeded even the aggressive goals set by the DOE."

"Each day our customers seek efficiency improvements using our aerodynamic,
thermal and acoustic solutions," remarked Stephen Remondi, Exa's President and
CEO. "We have been working with Peterbilt for many years and were pleased to
see them use Exa's solutions so effectively as part of this important
initiative that will benefit us all in the end."

About Exa Corporation

Exa Corporation develops, sells and supports simulation software and services
to enhance product performance, reduce product development costs and improve
the efficiency of design and engineering processes. Our simulation solutions
enable our customers to gain crucial insights about design performance early
in the design cycle, thus reducing the likelihood of expensive redesigns and
late-stage engineering changes. As a result, our customers realize significant
cost savings and fundamental improvements in their engineering development
process.Our products include, PowerFLOW^®, PowerDELTA^®with PowerCLAY^®,
PowerVIZ^®, PowerSPECTRUM^®, PowerACOUSTICS^®, PowerINSIGHT^®, PowerCOOL^® and
PowerTHERM^® along with professional engineering consulting services. A
partial customer list includes: AGCO, BMW, Ford, Hyundai, Jaguar Land Rover,
Kenworth, MAN, Nissan, Peterbilt, Renault, Scania, Toyota, Volkswagen, and
Volvo Trucks.

Founded in 1991, the company is headquartered at 55 Network Drive, Burlington,
MA, USA 01803. Tel: 1.781.564.0200; Fax: 1.781.564.0299; Email: info@exa.com;
URL: www.exa.com; NASDAQ:EXA

For more information about Exa Corporation or images please contact:

Michelle Murray-Ross, Exa Corporation, 1.781.564.0251; michelle@exa.com

Exa, PowerFLOW, PowerCLAY, PowerTHERM, PowerCOOL, PowerSPECTRUM, PowerDELTA,
PowerVIZ, PowerACOUSTICS and PowerINSIGHT are registered trademarks of Exa
Corporation.

The photos are also available via AP PhotoExpress.

CONTACT: Michelle Murray-Ross
         Exa Corporation
         1.781.564.0251
         michelle@exa.com

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