The Cummins ISL9 is rated up to 380 horsepower and 1250 lb.-ft. of torque and features flexible horsepower and torque ratings for medium-duty and vocational applications, International says.

International announced March 2 it now offers a fourth engine option for its DuraStar and WorkStar lineup of vocational trucks — the 9-liter Cummins ISL9. The engine is now available for order ...