While the Focus ST Is a truly unique car, you should always start with the basics. Our selection or 2013 to 2016 Focus ST cold air intakes from Airaid add impressive amounts of power onto its EcoBoost engine by allowing the turbocharger to pull in as much air as it needs. Your average EcoBoost Focus ST intake kit can add up to 10 horsepower with about the same amount of torque all in a quick, easy bolt-on installation that will make you wonder why you didn't do it sooner. On top of our intakes, we also have sever powerful tuners and monitors from SCT Performance and Superchips that can turn your Focus ST's performance up to 11 by adjusting your PCM's settings. Due to its pretty severe undertuning, the 2.0L EcoBoost engine can get an enormous performance boost with a tune alone, gaining up to 20 horsepower and 45 lb-ft of torque! Your ST's performance is even better when pairing both an intake and tuner! Once you're done here, make sure to take a look at our exhaust upgrades and Focus ST suspension components.