Hybrid Racing Cold Air Intake for 06-11 Civic Si

Full Silicone Construction Most powerful 8th Gen intake on the market Built-In Air Bypass helps to prevent hydro-locking Includes 3.5" velocity stack & filter Includes battery relocation kit Comes with couplers for large and small throttle bodies Requires tuning software like FlashPro Description Vehicle Fitment Technical Data Included Install Guide Big tube, big power! We spent countless hours designing, testing, and refining this design to ensure it was the absolute best intake available for the 8th Gen Civic Si platform. This intake is designed to make big gains on any setup, from totally stock to high-lift cams and huge exhausts. Dyno graphs are provided to show the intake's effectiveness against its competitors, but for example, we saw 14hp peak gain and 9hp average gain against the stock air box. Against competing  3.5" cold air intakes, we saw typical peak and average gains of around 2-3hp with a much smoother power band, meaning more power and better