Navistar is adding the Cummins ISB 6.7-liter engine as an option for its medium-duty DuraStar model.
The company will still be offering its proprietary DT and MaxxForce 7 medium-duty engines with exhaust gas recirculation technology for the foreseeable future, while the ISB will be the company’s selective catalytic reduction option.
Navistar is in the midst of a transition away from its EGR-only approach to meeting federal emissions standards, and the ISB addition is part of the company’s conversion for its medium-duty line.
The company is taking orders now for the ISB, and deliveries are scheduled to begin in December.
On March 18, Weddle’s trailer crossed over the centerline of the highway, ...