Navistar Inc. said it had shipped the first International DuraStar trucks with the Cummins ISB 6.7-liter engine from its assembly plant in Escobedo, Mexico.
The company announced in September it had started taking orders for its first selective catalytic reduction engine options for medium-duty trucks and school buses.
"The addition of the ISB to our portfolio in early September was the driving factor in achieving, just weeks later, our best Class 6-7 order month in two years," Bill Kozek, president of the North American truck and parts business, said in a Dec. 23 statement.
"Today we have received orders for more than 4,500 DuraStar units, and with initial customers such as Budget Truck Rental, Idealease and Penske, we are poised to regain market share in the medium-duty segment," he said.
