ISX12N (2018)


ISX12N (2018)

The 2018 ISX12N continues the evolution of emission leading natural gas engines from Cummins Westport, with the lowest certified Ultra Low NOx emission engines in North America – 90% lower than current North American EPA standards. With 400 hp / 1,450 lb-ft torque, and near zero emissions, the ISX12N is well suited for heavy-duty regional-haul truck/tractor, vocational, and refuse applications.

Reduced Emissions from Heavy Duty Trucks

• Lowest cost Move to Zero option: Minimal cost impact vs current natural gas product
• No infrastructure changes for current natural gas fleets
• Vehicles cost up to 70% less than electric
• Leverage existing fuel locations and expanding service/parts network
• No extra training needed and no operating cost changes for current natural gas fleets

• Available from leading truck manufacturers for heavy duty on highway transport, port drayage, refuse, vocational, and conventional truck applications
• Certified to EPA and California ARB optional Near Zero emissions standard
- Reduces smog forming NOx emissions by 90% vs. EPA 2010 standard
- One 2010 certified vehicle = the NOx emissions of TEN ISX12N vehicles

• Capable of operating on 100% CNG, LNG, or renewable natural gas (RNG)
− Significant GHG reductions with the use of RNG
− Learn more with CWI’s GHG Emissions Calculator -

The Natural Choice

  • Natural gas is the lowest carbon fuel available, with abundant domestic supply and stable pricing
  • Fueling infrastructure in place and growing

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NOx emission 0.02 g/bhp-hr. (90% below EPA)
Maximum Horsepower 400 HP (298 kW)
Peak Torque 1,450 LB FT (1,966 Nm)
Goverened Speed 2100 RPM
Type 4-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)

Product Finder Specifications

Natural Gas
Power 400 hp / 298 kW
Torque 1450 lb-ft / 1966 N•m



• 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

Brochures Available

Title Bulletin Number Request View  
CWI 2018 All Products Brochure View  Download
CWI ISX12N Brochure 5544037 Request View  Download
Integrated Power Flyer 5411035 Request View  Download
Natural Gas Engine Oils Request View  Download