CARB certifies ROUSH CleanTech’s Gen 5 propane engine for Blue Bird school buses to ultra-low NOx standards
Green Car Congress
JANUARY 24, 2022
The optional ultra-low CARB certification is 90% cleaner than current emissions standards for nitrogen oxides. Propane is well established as an economical, clean and domestically produced alternative fuel for school buses. V8 propane engine in 2020, our team has worked tirelessly to gain this emissions certification.
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