If you want more power then those 2.2's don't really have too many mods just normal stuff like intake exhaust. I understand where you're coming from on it if you're going to do exhaust though you'll have to keep in mind it's only a 4 cylinder You don't need some crazy 3" piping on there 2 inch to your muffler of choice wouldn't be bad and it'd make it a bit better to drive. But also like others are saying pay attention to your Aero and driving style because those will be your biggest FE improvements
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![](http://ecomodder.com/forum/fe-graphs/sig3408a.png)
Tank:
(No actual EPA numbers for car just used F/E numbers when i first got it)
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