In 1998, the BT 5.9 was redesigned as a 24 valve engine to update emission requirements. ISB stands for Interact System B. The ISB featured a Bosch VP44 rotary injection pump until 2003, when the injection system was upgraded to a Bosch high pressure common rail fuel injection system, which increased power output.
In 2001, a high output (HO) version of the ISB became available, which slightly increased the output of manual transmission equipped trucks. A 610 version of the ISB became available which pushed torque to 610 lb-ft. Well known for its low speed torque, the Cummins 5.9 ISB has an advantage over V8 diesel engines in the light duty truck market.
Roadmaster remanufactures engines to supply quality customer satisfaction.
Contact us at 800-447-9899 or email us with all your questions and requests.
Follow us on our Facebook page.
In Conclusion take a look at our dependable remanufactured engines process on our home page.
Roadmaster has the best service with over 50 years in business experience and customer care.
Furthermore, feel free to leave a comment. Share us as well!