Navistar, Inc. announced the launch of its heavy-duty International WorkStar vocational trucks powered by the company's 13.0L engine with selective catalytic reduction (SCR) emissions technology. The WorkStar is the fourth heavy-duty International truck model to transition to SCR technology since December 2012, according to the company.

The company's portfolio of SCR-based heavy-duty trucks also includes the International ProStar, International PayStar 5900 Set-Back Axle and International 9900i — all available with the Cummins ISX15 engine. In addition, Navistar's proprietary 13.0L engine with SCR was launched in the ProStar in April and is now available in the WorkStar. The remaining lineup of International heavy-duty truck models will transition to SCR emissions technology in a phased launch in the coming weeks based on volume and customer demand, according to the company.

The heavy-duty WorkStar model includes two variations, 7600 SBA (46 inch set-back axle) and 7600 SFA (30 inch set-forward axle). Both models feature a 113 inch bumper to back-of-cab (BBC).

Features include:

• Available high-visibility hood where front-end power take-off (FEPTO) is not required.

• Available 4x2, 6x4 and 8x6 axle configurations.

• Available from 365 hp 1,250 lb-ft torque up to 475 hp 1,700 lb-ft torque.

• Huck-bolted frame and crossmember system with a number of frame-rail options for maximum durability.

• Diamond Logic electrical system for greater reliability, improved productivity and lower maintenance costs.

• Double-sided, galvanized steel cab for maximum durability.

• Dual-powered steering gears and large front axle for excellent maneuverability.

• Wrap-around panoramic windshield for best-in-class visibility where FEPTO is not required.

• Optional Eagle interior with premium rosewood dashboard and easy-to-read ivory gauges or chrome bezel black gauges on instrument panel.

• Easy-to-clean vocational floor mats and vinyl interior panels throughout the cab to improve durability.