What performance mods can I do to my 07 ford focus?

I just bought a 07 ford focus se 2.0l and I would like some suggestions on what i could do to my car to enhance its performance without spending to much money.What performance mods can I do to my 07 ford focus?i beg to differ ford focus is in exelant tuner car stop by and visit us at focaljet.com all focus owner more proformance parts than you will ever need .What performance mods can I do to my 07 ford focus?Well, short of Fords performance parts or dealer installed mods, most things you would want to do ie: intake, exhaust, pulleys, etc. will void your warranty. A racing chip may be something to look into, but truthfully, a focus is more economy than tuner. Go to the dealer...thats prob your, and your warranty's, best bet