Well, I have a DIY for more horsepower that you can try. All you will need is your car, a blindfold, and some windex.
1) Put your car on the side of the street in an inconspicuous place.
2) Pop the hood and spray windex on top of your engine cover.
3) Get inside the car.
4) Make sure all the windows are rolled down and your radio is off.
5) Put the key into the ignition and crank your Camry up.
6) Make sure the car is in Park or you will get no horses, just corpses.
7) Put your blindfold on so you see nothing.
8) Next, step on the gas really hard.
9) You will feel and hear the extra horsepower. Caution: It will not work if the blindfold is off.
Disclaimer: I am not responsible for any serious injury or ridicule that results from performing this mod.
