How can I increase the horsepower of my Ford Focus ST?

I recently purchased a Ford Focus ST and I'm looking to increase its horsepower. Are there any specific modifications I should make?

You can start by upgrading the intake and exhaust systems, as well as adding a performance chip.

Invest in a quality set of tires to improve traction and handling, which can also impact horsepower.

Consider installing a cold air intake or a turbocharger to add more power to your Focus ST.