LISLE, Ill. — The 13-litre International MaxxForce engine with SCR has now been certified by the US Environmental Protection Agency.

“EPA certification of our proprietary 13-litre engine with SCR completes our transition to SCR-based technology for our heavy-duty engines,” said Jack Allen, Navistar’s new executive vice-president and chief operating officer. “We’ve reached another milestone in our emissions strategy transition and are on track to deliver our first ProStar units with our SCR-based 13-litre engines at the end of April.”

The company says it now offers a complete line of SCR-based engines to serve the North American Class 8 on-highway market.

Meanwhile, the Navistar board announced Allen is taking over the roles of executive v.p. and COO, effective immediately. Allen has served as president of the company’s North America Truck and Parts business since June, 2012.

“Jack is a results-focused leader with a deep understanding of the commercial truck industry and Navistar. He has successfully run nearly every important part of our business at one point during his 31-year career at the company,” said Troy Clarke, Navistar president and chief executive officer. “Together, Jack and I look forward to working with our experienced leadership team and talented group of employees as we take further steps to strengthen our North American core businesses, improve quality and customer satisfaction, drive future profitability, and deliver value to shareholders.”