J.B. Hunt Transport Services has purchased 1,525 Cummins ISX 400 ST2 engines for its new Freightliner Century Class trucks.

Approximately 800 new tractors with the ISX engines will be delivered by the end of this year. The balance of the Cummins order will be delivered in 2000.
Earlier this year Hunt signed a $1 billion contract for up to 15,000 tractors to be delivered over the next five years.