Power    320 - 400 hp      239 - 298 kW
Torque    1150 - 1450 lb-ft      1559 - 1966 N•m
Certification      EPA 2018
Overview:
The 2018 ISX12N continues the evolution of emissions-leading natural gas engines from Cummins Westport. Certified to the California Air Resources Board and Environmental Protection Agency's (EPA) Optional Low NOx emissions standard of 0.02 g/bhp-hr, it has 90% fewer NOx emissions than the current North American EPA standard. With 400 hp / 1,450 lb-ft torque, and near-zero emissions, the ISX12N is well suited for heavy-duty regional-haul truck, vocational, refuse applications, and motorcoach.
Reduced Emissions from Heavy Duty Trucks
Reduces smog forming NOx emissions by 90% vs. EPA NOx Standard
Can operate with 100% CNG, LNG, or renewable natural gas (RNG)
Significant GHG reductions with the use of RNG. Learn more with Cummins Westport GHG Emissions Calculator.
Natural gas is the lowest carbon fuel available, with abundant domestic supply and stable pricing
Fueling infrastructure in place and growing
No infrastructure changes are required for current natural gas fleets
Features
Heavy Duty Class 8 performance and efficiency
New electronic engine, ignition, and On-Board Diagnostics (OBD) emission control features.
New engine control module – ECM model number CM2380.
Closed Crankcase Ventilation system for more complete combustion and lower emissions
Specifications
NOx emission  0.02 g/bhp-hr. (90% below EPA)
Maximum Horsepower  400 HP (298 kW)
Peak Torque1,450 LB FT (1,966 Nm)
Goverened Speed  2100 RPM
Type4-cycle, spark-ignited, in-line    6 cylinder, turbocharged, CAC
Engine Displacment  762.2 CU IN (119.9 Liters)
Number of Cylinders   6
Operating Cycles    4
Net Weight (dry)  2,650 LB (1,202 KG)
Fuel Type   CNG/LNG/Biomethane
Aftertreatment  Three-Way Catalyst
Base Warranty  2 Years, 250,0000 Miles (402,336 KM)