18 Jan CARB Certifies Next-Generation Propane Engine in Blue Bird School Buses to Lowest NOx in Market
ROUSH CleanTech first to earn the optional ultra-low nitrogen oxide CARB certification for 2022 model year with its Gen 5 propane engine NEWS HIGHLIGHTS ROUSH CleanTech is first OEM to receive CARB’s 0.02 grams per brake horsepower-hour (g/bhp-hr) ...