Cold Air Intake Kit for Honda Civic Si (2012-2015) 2.4L EnginePerformance Cold Air Intake System for Honda Civic SI Precision Airflow & VTEC Engagement This performance intake system is engineered to maximize your SI's breathing potential. By replacing the restrictive factory intake assembly with a high velocity induction path, this kit allows the high revving engine to draw in a larger volume of oxygen rich air with significantly less effort. The result is a more energetic combustion cycle, providing crisper