DESCRIPTION 2011 International Prostar Truck (NJP326), Cummins Isx engine, 10 speed transmission, 2.90 rear gears, air ride suspension, 5th wheel, power windows and locks, heat/ac, AM/FM radio, low pro 22.5 tires, approximately 791,000 miles. Serial Number: 1HSCUAPR6BJ362043 Notes: Seller bought in April because they were in a pinch for a truck while another was in the shop. Synchronizers are getting a little weak in the transmission when switching from high to low. However, other than that it shifts great and has been a good truck.