Equipment Type

Navistar Adds SCR Engine to International DuraStar

Navistar has added the Cummins ISB 6.7-liter engine to its medium-duty engine offerings. 

September 04, 2013

Navistar has added the Cummins ISB 6.7-liter engine to its medium-duty engine offerings. The engine will be offered on the International DuraStar medium-duty trucks, as well as the company’s IC Bus CE Series school buses.

The vehicles will be Navistar's first medium-duty vehicles with selective catalytic reduction (SCR) emissions aftertreatment. Navistar will begin taking orders immediately for trucks and buses with the Cummins ISB with initial truck builds later this month and regular production for trucks is scheduled for December 2013.

"Adding the proven, market accepted Cummins ISB to our line-up is a key part of our strategy to offer our customers the most comprehensive medium-duty truck and bus offerings," said Jack Allen, Navistar executive vice president and chief operating officer. "The ISB will complement our existing engine offerings and will be a catalyst as we look to improve our medium-duty truck and bus business in 2014 and beyond."

Navistar will continue to offer EGR-only versions of its mid-range engines utilizing its medium-duty emissions credits. The company has not yet announced the next steps of its comprehensive SCR engine strategy.

"Customers seeking commonality in their engine line-up have expressed significant interest in combining the Cummins ISB engine with our chassis and we anticipate strong demand and orders as a result,” said Bill Kozek, Navistar president, North America Truck and Parts.

This year, Navistar added the Cummins SCR aftertreatment system to its proprietary MaxxForce 13-liter for the launch of ProStar, WorkStar, TranStar and PayStar models. The Cummins ISX 15-liter engine is offered in the company's Class 8 trucks—including the International ProStar, PayStar 5900 and 9900i models.

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