Vehicles maintains a list of all the CNG vehicles for the US.

I recommend buying an OEM (Original Equipment Manufacturer) or QVM (Qualified Vehicle Modification).

  • Westport WiNG - Bill Knight, Bob Hurley, Joe Cooper
  • Venchurs
  • BAF - now owned by Westport (WPRT)
EPA Conversions (aftermarket conversions)
Ebay search for CNG vehicles - be very careful on Ebay... some vehicles may not be EPA approved conversions.