If you go to the EPA website they have a list of vehicles and "approved retrofit kits" for those vehicles. I do not believe i have seen one for the metro. with that said unless your state has regulation in place that prevents you from using another aftermarket kit, as long as you have a tank that isn't expired you can easily retro fit it for a fraction of the cost of the "EPA approved vehicles and kits", and be way ahead of the game. The only benefit you have from an EPA kit is that there is a federal Tax incentive for brand new vehicles and some states will recognize the vehicle and provide a state tax incentive as well that helps to pay for your kit. In the end you still come out loosing your shorts on their kits because they mark the price up 5-6K because it carries the stamp. It doesn't perform any better than many of the other aftermarket kits they have simply wasted their money with the EPA to get stamp to coerce simple minded individuals into wasting their money for another useless gov program. (sorry for the rant). There are many kits available that run on any vehicle and it will save you money and you will run a cleaner burning fuel and be greener than the next guy for doing it. Just make sure to have a tank that is DOT approved and hasn't expired. There are some other simple things to consider as well but if you have the CNG available and you drive enough to make it worth it...go for it!
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