If you want to quickly gain power, improved throttle response nothing beats a K&N drop in air filter!
They install in minutes, last a long time, plus they save you money from having to buy new air filters all the time!
Photos:
![2013+ Ford Focus ST K&N drop in air filter 2013+ Ford Focus ST K&N drop in air filter](http://www.modernperformance.com/images/uploads/1494_2336_popup.jpg)
![2013+ Ford Focus ST K&N drop in air filter 2013+ Ford Focus ST K&N drop in air filter](http://www.modernperformance.com/images/uploads/1494_2341_popup.jpg)
If you want any more information, click on the photos above to jump to our product page!