An aftermarket conversion is a vehicle or engine modified to operate using a different fuel or power source. Conventional vehicles and engines from original equipment manufacturers (OEMs) can be converted to run on fuels like propane, natural gas, or electricity.
Many OEMs offer alternative fuel and advanced technology vehicles and models, fuels, and technologies vary. These vehicles are considered conversions because gasoline engines are modified to run on an alternative fuels. Similarly, vehicles that are already in use can also be converted and models, fuels and technologies vary.
All vehicle and engine conversions must meet emissions and safety standards instituted by the U.S. Environmental Protection Agency, the National Highway Traffic Safety Administration, and state agencies like the California Air Resources Board.
Learn about the basics of engine and vehicle conversions and installation.
Learn about the emissions and safety regulations that apply to conversions.