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. The new engine certification covers ROUSH CleanTech Gen 5 7.3L V8 propane engines (based on the new Ford 7.3L engine is narrower than the previous 6.8L, allowing more room for service work.
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