2006-2011 Civic Si 2.0L Polished SP Series Cold Air Intake (INJSP1578P)Increase airflow and unlock consistent performance in your Honda Civic Si Coupe and Sedan with a polished cold air intake designed for efficient power gains. As part of Injen's SP Series, this tuned intake system incorporates MegaRam and Air Fusion technologies to create a smooth, unrestricted air path while maintaining safe air fuel ratios across the powerband. The precision engineered aluminum intake tube enhances engine breathing and delivers a