If it has the same capabilities as the ISL it can be programmed for any of the HPs listed below. On the build sheet for my MH the engine is listed as a 350 ISL but it has been factory reprogrammed for 400HP.
Cummins 8.3 ISC
Firetruck/motorhome/truckFiretruck/motorhome/truck
1,050 pound force-feet (1,424 N·m) @ 1,300 rpm, 310 horsepower (231 kW; 314 PS) electronically governed at 2,500 rpm
1,150 pound force-feet (1,559 N·m) @ 1,300 rpm, 330 horsepower (246 kW; 335 PS) electronically governed at 2,500 rpm
1,200 pound force-feet (1,627 N·m) @ 1,300 rpm, 400 horsepower (298 kW; 406 PS) electronically governed at 2,400 rpm