The International PayStar 5900i Set-Back Axle Truck, a Class 8 vocational on/off-road vehicle, features a new set back axle design that allows for front load distribution and improved maneuverability. Powered by Cat and Cummins diesel engines with up to a 625 hp rating, it includes a sloped hood design for greater visibility, outside air cleaners for improved air intake, and reduced service intervals, and a new heavy-duty front bumper with tow pin or tow hooks. International Truck & Engine. 800-448-7825.