Navistar has announced its International LoneStar on-highway tractor with the Cummins ISX15 engine and selective catalytic reduction emissions technology is now available for order, marking Navistar’s full transition of its heavy-duty product line from exhaust gas recirculation to SCR.

“We now offer a full lineup of SCR product offerings for our Class 8 customers and we have completed each launch on time,” said Bill Kozek, president North America truck and parts, Navistar. “Throughout this transition, we have seen an improvement in customer confidence reflected in our Class 8 order share and we are already starting off strong with our medium-duty transition as we move into 2014.”

Navistar began its Class 8 SCR transition in December of 2012 with the launch of the International ProStar with Cummins ISX15 and then the International ProStar with MaxxForce 13 with SCR in April. Today, the company’s portfolio of SCR-based heavy-duty trucks also includes the International PayStar 5900 Set-Back Axle and International 9900i with the Cummins ISX15 engine as well as the International PayStar, TranStar and WorkStar with the MaxxForce 13 engine with SCR.

Navistar announced in early September that it has received more than 11,500 orders for Cummins ISX engines since Dec. 1, 2012, and more than 6,000 orders for MaxxForce 13 engines with SCR since March 1, 2013.