How can I improve my Ford Focus engine performance?

I am the proud owner of a Ford Focus, but I have noticed that the engine performance isn't as good as it used to be. What can I do to improve it?

First, make sure you are keeping up with regular maintenance, such as oil changes and spark plug replacements. Additionally, upgrading to a performance air filter can increase horsepower and improve fuel efficiency.

Consider installing a performance chip or tuner, which can optimize your Ford Focus's engine for better performance. Just make sure to do your research and choose a reputable brand.

Check for any clogs in your exhaust system, as this can greatly affect engine performance. Consider upgrading to a high-flow exhaust for better airflow and a slight increase in horsepower.