How to increase an automatic honda civic horsepower?

How to increase an automatic honda civic horsepower? - 1

Added (1). am i able to put an exhaust, headers and a cold air intake to an automatic civic 09?

Buy a car thats not a honda civic lol

By trading it in for a Honda Accord.

The only thing you can do with out spending thousands of dollars is a cat-back exhaust system. You get an average of 25 more horsepower and can actually feel it.
Honda's all have tight valve trouble as a common problem and the valves need adjusting every 60,000 miles or you get power loss and a rough idle.
Don't waste your money on a cold air intake. All vehicles come with a cold air intake from the factory that work just fine. The after market shiny chrome ones have a problem ruining MAF sensors because the oil on the cleanable filters migrates to the MAF sensor's wires ruining the MAF.