KYOSTAR Cold Air Intake System for 2013-2017 Ford Focus ST 2.0L L4 Upgrade your 2013-2017 Ford Focus ST equipped with the 2.0L L4 engine with the KYOSTAR Cold Air Intake System. Designed as a performance-oriented replacement for the factory intake configuration, this intake provides an upgraded airflow path for the compatible Ford Focus ST application. The vehicle-specific intake layout is designed to provide a more direct airflow route compared with the factory-style intake