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Cummins Westport Inc. - ISL G Near Zero Gas Engines

The ISL G Near Zero (NZ) NOx natural gas engine is the first MidRange engine in North America to receive emission certifications from both the U.S. Environmental Protection Agency (EPA) and Air Resources Board (ARB) in California for meeting the 0.02 g/bhp-hr optional Near Zero NOx Emissions standards for medium-duty truck, urban bus, school bus, and refuse applications.

The game-changing Cummins Westport ISL G NZ exhaust emissions will be 90% lower than the current EPA NOx limit of 0.2 g/bhp-hr. California ARB has defined this certified Near Zero emissions level of 0.02 g/bhp-hr NOx as equivalent to a 100% battery truck using electricity from a modern combined cycle natural gas power plant. The ISL G NZ will also meet the 2017 EPA greenhouse gas emission requirements with a 9% GHG reduction from the current ISL G.


Key Specifications
Advertised Horsepower 320 hp (239 kW)
Peak Torque 1,000 lb-ft (1,356 N•m)
Governed Speed 2,200 rpm
Clutch Engagement Torque 550 lb-ft (746 N•m)
Displacement 540 cu. in. (8.9 L)
Bore and Stroke 4.49" x 5.69" (114 mm x 145 mm)
Net Weight w/ Std. Accessories, Dry 1,625 lbs (737 kg)

Company Info

101 – 1750 West 75th Avenue
Vancouver, BC
CA, V6P 6G2


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