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

I recently purchased a Ford Focus ST and I'm looking to maximize its performance. What are some tips and upgrades I can make to increase its horsepower and overall driving experience?

First thing you should do is reprogram your engine's computer with a performance tune. This will optimize the engine's settings and give you a noticeable horsepower increase.

Consider adding an aftermarket cold air intake. This will allow your engine to breathe easier and result in increased horsepower and torque.

Upgrading your exhaust system can also lead to a significant horsepower gain. Look for a high-flow exhaust that is specifically designed for your Ford Focus ST.