CARB certifies ROUSH CleanTech’s Gen 5 propane engine for Blue Bird school buses to ultra-low NOx standards

Green Car Congress
By mmillikinJan 24, 2022, 5:30 am466 ptsHot
ROUSH CleanTech is the first original equipment manufacturer to receive California Air Resources Board’s (CARB’s) 0.02 grams per brake horsepower-hour certification for 2022 model year vehicles. The optional ultra-low CARB certification is 90% cleaner than current emissions standards for nitrogen oxides.…

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