2014 Dodge Charger photo courtesy of Chrysler.

2014 Dodge Charger photo courtesy of Chrysler.

The U.S. Environmental Protection Agency (EPA) has certified Alliance AutoGas for a number of propane vehicle conversions that use the Prins VSI bi-fuel system. The VSI system comes with a three-year, 36,000-mile warranty and includes ASME-approved fuel tanks with mounting options.

The 2013-MY and 2014-MY Transit Connect vans with Ford’s 2.0-liter engine in both the passenger and cargo configurations have been approved for conversion.

Alliance AutoGas has also received approval for Prins VSI conversions that incorporate GM’s 5.7 liter engine on the following 2013 and 2014 passenger and public-safety-fleet vehicles: Dodge Charger, Dodge Magnum, Dodge Challenger and the Chrysler 300.

Click for the full list of Alliance AutoGas' certifications.