What is the best way to improve the performance of a Ford Fiesta?

I have a Ford Fiesta and I've noticed that it's not running as smoothly as it used to. I want to improve its performance but I'm not sure where to start. What are some tips and tricks to increase the power and efficiency of my Ford Fiesta?

Adding a cold air intake and exhaust system can greatly improve the performance of your Ford Fiesta. These modifications will allow the engine to breathe easier and increase power output.

Make sure to regularly change your air filter and spark plugs. This will help your engine run more efficiently and increase its performance.

Consider upgrading to performance tires. They will provide better traction and handling, resulting in a smoother and more powerful ride.