Cummins ISB6.7 EPA 2010 delivers superior performance with the lowest cost of operation and maximum uptime to make it best-in-class.  Its High Pressure Common Rail (HPCR) fuel system delivers an optimum balance of performance, emissions control and fuel economy across the entire operating range.  Ratings range from 200-325 hp and a maximum 750 lb-ft of peak torque. Cummins offers both a 220 horsepower (520ft-lb torque) and 250 horsepower (660 lb-ft torque) that are certified at 0.20g NOx without the use of emissions credits.