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The Thomas Built Buses Saf-T-Liner® C2 CNG, equipped with the Cummins ISB 6.7 G engine, is the industry’s first Type C bus fueled by compressed natural gas (CNG). The C2 CNG bus offers excellent driver ergonomics and maneuverability along with the best visibility in its class. And, Thomas Built construction standards ensure outstanding safety and long-term durability. Plus, CNG creates up to 13% less greenhouse emissions than diesel. So, if you’re looking for a greener version of your favorite yellow bus, talk to your Thomas Built dealer. They’ll help you make the best alternative fuel decision for your fleet and even advise you on how to set up alternative fuel infrastructure.






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  • Seating capacity
    Up to 81
  • Wheelbase
    219", 238", 259", 279"
  • GVWR
    Up to 33,000 lbs.
  • Engine
    • Cummins ISB 6.7 G
      • HP: Up to 240
      • Torque: Up to 560 LB-FT @ 2400 rpm
  • Fuel Tank
    4-tank CNG System
  • Tank Capacity
    60 Diesel Gallon Equivalent






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Propane Autogas Benefits


    • Cleanest-burning alternative fuel
    • Greenhouse gas emissions reduction up to 13% less than diesel
    • Four fuel tanks (60 diesel gallon equivalent)
    • Maintenance-free three-way catalyst aftertreatment
    • Domestic fuel source reduces dependency on foreign oil



(800) 352-5355