Lowest NOx in Market–Blue Bird Propane
It was recently announced that our Blue Bird Propane school buses with the Roush Gen5 engines cleared the CARB UltraLow NOx Certification. This ultra-low CARB certification is 90% cleaner than current emissions standards for nitrogen oxides. From the article in Business Wire “Nitrogen oxides, known as NOx, are a group of gases known as a...

