What could i add to my 06 Ford Focus ZX4 to increase torque?

I just barely bought it and i wanted to give it a bit more balls, what's something fairly cheap that would make a notable difference? I don't really care for hp it has enough for me i'm just after the get up and go. I don't really know to much about cars, but i heard that a cold air intake may push it up some and give me a bit better gas mileage as well. Any help would be appreciated! :)
 
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