Emissions EPA Exhaust Kenworth 
Green Car Congress
DECEMBER 22, 2009
Kenworth Truck Company is expanding its product line with the introduction of the Cummins Westport ISL G natural gas engine for the Kenworth T800 short hood and W900S models. Now available for order, Kenworth's natural gas models are focused on vocational, municipal, and pickup and delivery applications. Earlier post.)
Green Car Congress
JULY 6, 2010
The Westport GX 2010 15L engine has been certified by the US Environmental Protection Agency (EPA) to 2010 emissions compliance—0.2 g/bhp-hr particulate matter (PM)—without the use of emissions credits. Factory installation of the GX is available in both Kenworth and Peterbilt tractors.
Green Car Congress
DECEMBER 10, 2013
Westport HPDI engines operate at similar engine temperatures as diesel engines, reducing cooling challenges and reducing stress related reliability and durability challenges for other SI-based engine systems including turbochargers and exhaust treatment systems. Improved emissions profile: Westport HPDI 2.0 Westport HPDI 2.0
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