Aftermarket Alternative Fuel Vehicle (AFV) Conversions

Conventional original equipment manufacturer vehicles altered to operate on propane, natural gas, methane gas, ethanol, or electricity are classified as aftermarket AFV conversions. All vehicle conversions, except those that are completed for a vehicle to run on electricity, must meet current applicable U.S. Environmental Protection Agency (EPA) standards. For more information about vehicle conversion certification requirements, see the Alternative Fuels Data Center's Vehicle Conversions website and EPA's Certification and Compliance for Vehicles and Engines website. (Reference 40 CFR 85 and Enforcement Policy on Vehicle and Engine Tampering and Aftermarket Defeat Devices)