Roto-molded Housing and Ram Air Scoop: The EVO1206 system features our 2-piece box design that incorporates our boost plenum. The box attaches to our fully incorporated ram air scoop to capture the maximum amount of cool air to feed that hungry turbo. , , 6061 Aluminum Intake Tube: The EVO1206 Evolution Air Intake System uses a custom designed and dyno-tuned, aluminum intake tube that utilizes our patented air fusion and MR technology to produce huge power gains while retaining an OE quality fit and safe fuel trim levels. SuperNano-Web Dry Air Filter: "That's massive!"is all you will hear about this SuperNano-Web Dry air filter that is included with the EVO1206 cold air intake system. This filter has been uniquely designed to work with the downward facing orientation to ensure a leak-proof seal. Using the largest filter possible for this application has increased the available air volume - resulting in added power while keeping the installation process quick and simple. , , Quality Hardware: From the Stainless Steel Band Clamps with an inner protective liner to the reinforced automotive grade silicone coupler, every aspect is covered for a perfect and secure fit. , , Hassle-Free Installation: Make it easy! By designing this kit in a 3D workspace, you're ensured a quick and easy installation that not only increases the power output of your engine, but also provides a clean and powerful look that others see every time you pop your hood. Dyno Proven: Clean and simple, NUMBERS talk! Injen has put in the time and diligence to stand behind our performance data. We put in the time to test and prove that we have developed a superior kit for your Subaru. After hours of designing and dyno teWRX STIng, Injen is proud to say that the EVO1206 Evolution Air Intake system puts down numbers of up to 26 additional horsepower and 34 Ft.-lbs. of torque.