Replace the intake system on your 2006–2011 Civic Si with the Hybrid Racing Cold Air Intake.
The large intake path is built for a calibrated 8th-generation Si, from a lightly modified car to a more developed naturally aspirated setup. Reinforced silicone helps limit heat soak, while the bellmouth and bypass manifold manage airflow into the engine. A relocated battery and revised hose routing create the space the larger system needs.
Features & specifications
3.5-inch fiberglass-reinforced silicone intake, with 1/4-inch wall thickness
6-inch velocity stack and filter
Air-bypass manifold with factory MAF and breather connections
Manufacturer testing: 14 hp peak and 9 hp average gains over the stock airbox
Manufacturer comparisons: approximately 2–3 hp over other 3.5-inch intakes; results depend on setup and tune
Important notes
Requires tuning, such as Hondata FlashPro, with the specified MAP-based approach; do not run the factory ECU calibration. Avoid deep water. The intake and battery-relocation components are supplied as a complete kit.
