Navistar has now completed the SCR transition on its fifth heavy-duty International truck model, the TranStar targeted at regional hauls. It’s available now with the MaxxForce 13-liter SCR engine.

Navistar has launched production of its International TranStar regional-haul tractor with MaxxForce 13 engine with selective catalytic reduction (SCR) emissions technology, the second such launch in the last month. The WorkStar vocational model also now sports an SCR engine, bringing the total number of heavy-duty Internationals to transition to SCR technology since December 2012.

The TranStar’s MaxxForce 13 SCR engine can be spec’d with 370 to 410 hp and 1350 to 1900 lb ft of torque. The Cummins Westport ISL G natural gas engine with 320 hp and 1000 lb ft of torque is also offered.

The company says it’s on track to complete the SCR transition of all its heavy-duty truck offerings soon.

As of now, the company’s collection of SCR-equipped International trucks includes the ProStar, PayStar 5900 set-back axle, and the 9900i, all with the Cummins ISX15 engine. The International ProStar, WorkStar, and TranStar are available with the MaxxForce 13 SCR engine.

The TranStar features a set-back axle and a 50-degree wheel cut, with what’s claimed to be the shortest bumper-to-back-of-cab (BBC) length in the industry of 107 in. Wheelbase options range from 140 to 295 in.