LOUISVILLE, KY - Navistar, Inc. announced 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.