B6.7N (2018)


B6.7N (2018)

Cummins Westport introduces the new B6.7N natural gas engine for the school bus, shuttle, and medium-duty truck markets.  Rated up to 240 hp / 560 lb-ft torque, the B6.7N offers a reliable, low-emissions, and low cost option for your fleet.  The B6.7N is certified to California Air Resources Board Optional Low NOx standard of 0.1 g/bhp-hr - 50% lower NOx emissions than current EPA regulations.

  • 100% natural gas engine, featuring spark-ignited stoichiometric combustion with cooled EGR and a maintenance-free Three-Way Catalyst
  • Closed Crankcase Ventilation (CCV) system and On-Board Diagnostics for optimal emissions performance
  • Certified to California Air Resources Board Optional Low NOx 0.1 g Standard - 50% below current EPA standard); exceeds 2017 EPA GHG requirements
  • Cost-efficient and reliable performance

For additional information visit cumminswestport.com and cwiplaybook.com.


NOx emission 0.1g / bhp-hr (50% below EPA)
Maximum Horsepower 240 HP / 179kW
Peak Torque 560 lb-ft / 759 Nm
Governed Speed 2400 RPM
Type 4-cycle, spark-ignigted, in-line
6 cylinder, turbocharged, CAC
Engine Displacement 409 CU IN / 6.7 Liters
Number of Cylinders 6
Operating Cycles 4
Net Weight (Dry) 1,150 lb / 522 KG
Fuel Type CNG / LNG / Biomethane
Aftertreatment Three-way Catalyst
Base Warranty 2 years, Unlimited Miles

Product Finder Specifications

Natural Gas
Power 240 hp / 179 kW
Torque 560 lb-ft / 759 N•m

Brochures Available

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