Lists of EPA-Compliant Alternative Fuel Conversion Systems
- Conversion systems for new vehicles or engines
- Conversion systems for intermediate-age vehicles or engines
- Conversion systems for outside useful life vehicles or engines
All of these lists are updated periodically. Please check back for updates.
Conversion Systems for New Vehicles or Engines
Certified conversion systems may be applied to new and relatively new, intermediate age, or outside useful life vehicles/engines covered by the conversion certificate.
In order to be included on this list, a conversion system must be issued a certificate of conformity. However, due to processing differences, not all conversion systems that have a certificate are included.
- Certified conversion systems for new vehicles or engines (XLS)(601 K,
January 2021)
Includes ALL light-duty and heavy-duty chassis certified conversions. Includes ONLY certified heavy-duty conversions where the manufacturer requested to be included on this list.
Conversion Systems for Intermediate-Age Vehicles or Engines
Conversion systems on this list may be applied to intermediate age or to outside useful life vehicles/engines covered by the conversion manufacturer's compliance demonstration.
- Conversion systems for intermediate-age vehicles or engines (XLS)(543 K, May 2020)
Conversion Systems for Outside Useful Age Vehicles or Engines
Conversion systems on this list may only be applied to vehicles/engines that have exceeded their regulatory useful life as indicated in the conversion manufacturer's compliance demonstration.
- Conversion systems for outside useful life vehicles or engines (XLS)(83 K, March 2017)