MaxxForce Receives EPA Emissions Certification for 2010 MaxxForce 13
MaxxForce® 13 Big Bore Engine is Latest to Receive Certification, Additional Certifications Expected in the Weeks Ahead

LOUISVILLE, Ky. (March 25, 2010) – Navistar, Inc. announced last night at the Mid-America Trucking Show it has received certification from the U.S. Environmental Protection Agency (EPA) for its 2010 MaxxForce® 13 Advanced EGR (exhaust gas recirculation) big bore diesel engines.

The MaxxForce 13 engine powers the International®  ProStar®+ line-haul tractor, International® TranStar® regional haul tractor and the International® PayStar® severe service truck. The International ProStar is the top-selling* Class 8 on-highway truck in the combined U.S. and Canada market.

“Receiving EPA certification for our MaxxForce 13-liter big bore engine is another important milestone as we prepare to launch our 2010 line-up of trucks,” said Ramin Younessi, Navistar group vice president, product development and strategy. “We anticipate receiving additional EPA certifications for our other engines in the weeks ahead as our manufacturing plants begin to ramp-up for full production.”

International® brand on-highway commercial vehicles and IC Bus™ brand school and commercial buses powered by 2010 MaxxForce engines use MaxxForce Advanced EGR emissions technology. Navistar has pursued its in-cylinder emissions solution path for most of the past decade to provide the most customer-friendly powertrain in terms of fuel economy, performance and overall ownership costs. With MaxxForce Advanced EGR, customers won’t have the worry or inconvenience of finding or filling liquid urea. Most importantly, MaxxForce Advanced EGR provides customers with a no-hassle solution that keeps responsibility for emissions compliance with the manufacturer—not the vehicle owner or driver.

*Based on R. L. Polk & Co. U.S. & Canada registration data, International® ProStar® is the #1 selling class 8 in U.S. and Canada combined for the 12 month period ending January, 2010.


About Navistar
Navistar International Corporation (NYSE: NAV) is a holding company whose subsidiaries and affiliates produce International® brand commercial and military trucks, MaxxForce® brand diesel engines, IC Bus™ brand school and commercial buses, Monaco RV brands of recreational vehicles, and Workhorse® brand chassis for motor homes and step vans. It also is a private-label designer and manufacturer of diesel engines for the pickup truck, van and SUV markets. The company also provides truck and diesel engine service parts. Another affiliate offers financing services. Additional information is available at

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