Local Knowledge About CNG Conversions

The number and variety of factory-ready compressed natural gas (CNG) vehicles and conversion-eligible CNG vehicles is increasing. Many of light- and medium-duty CNG vehicles in operation around the U.S. today resulted from a conversion process or retrofit performed by qualified installers utilizing certified after-market kits manufactured by a variety of reputable companies across the nation. Dedicated conversions run solely on CNG and normally have a fuel capacity equal to or larger than the original gasoline or diesel tank. Bi-fuel vehicles have the ability to run on either CNG or gasoline/diesel. These bi-fuel vehicles typically retain their original gasoline/diesel tank and are retrofitted with an additional, smaller-capacity CNG tank. Typically, certified installers will only perform a CNG conversion on new or nearly new vehicles. CNG conversion kits must meet stringent Environmental Protection Agency (EPA) and/or California Air Resources Board (CARB) requirements. Different states have different requirements on vehicle emissions, so please check whether your state follows EPA or CARB guidelines before purchasing or converting your vehicle.