I'd do what I'm doing, save and buy a better car. The 2.0L is great and all but remember your modding a contour, its not the greatest car to mod with, since there isn't many mods out there for it.
But if you really want to do something to it, do the SleeperZ intake (sticky found on top of catagory), replace air filter with K&N filter, and replace resonator with aftermarket one (magnaflow has one that fits nearly perfect.) With these mods you should get 10HP gain or more and save money to use for gas.
I haven't done any of these mods but I have upgraded my audio and I'm glad I did. But its up to you what you want to do, "The power is yours." (Captain planet's motto for you that don't remember.
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Hope this helps.
