How to improve performance in a Ford Fiesta ST?

I recently purchased a Ford Fiesta ST and I'm wondering how I can improve its performance. Are there any aftermarket parts or modifications that you would recommend? I want to increase horsepower and acceleration without sacrificing reliability.

One of the best ways to improve performance in a Fiesta ST is by installing a cold air intake. This will allow for increased airflow to the engine, resulting in more power and improved throttle response.

If you're looking to increase horsepower, a performance tune is a great option. This can be done through an access port or by taking your car to a professional tuner. Just make sure to do your research and go with a reputable tuner.

Another option for improving performance is by upgrading the exhaust system. A larger diameter exhaust can help improve exhaust flow, resulting in more power and a better sound.