What are the best performance upgrades for the Ford Fiesta ST?

I recently purchased a Ford Fiesta ST and I'm looking to improve its overall performance. What are some recommended upgrades that will give the car a boost in horsepower and handling?

One of the best performance upgrades for the Ford Fiesta ST is a cold air intake. This will increase airflow to the engine and improve overall horsepower.

Another great upgrade is a cat-back exhaust system. This will improve exhaust flow and give the car a more aggressive sound.

Investing in a performance tune can also greatly improve the Fiesta ST's performance. It will optimize and fine-tune the engine for maximum power and responsiveness.