How to improve performance in a Ford Focus?

I recently bought a Ford Focus and I'm wondering what I can do to improve its performance. Are there any modifications or upgrades that you would recommend?

One simple way to improve performance is by installing a cold air intake. This will increase air flow to your engine and result in better horsepower and fuel efficiency.

Another option is to upgrade to a performance exhaust system. This will not only improve performance, but also give your car a more aggressive sound.

If you're looking for a more significant improvement, consider installing a chip or tuner. These devices can optimize your car's engine settings for better performance.