This Ford F150 Cold Air Intake fits 2004 - 2008 5.4L F - 150's and features the ROUSH air filter, air dam, and induction tube.The ROUSH air filter media is a synthetic nano - fiber material that traps the smallest dirt particles that ordinary cotton - gauze performance filters can't capture. ROUSH air filters are constructed using the finest materials available today, featuring a hand - poured urethane body that won't crack, curl or shrink like other rubber or plastisol units used by our competitors. This ROUSH air filter is 100 washable. The ROUSH Cool Air Dam surrounds the filter, helping to keep out hot air from the engine, further maximizing performance.The engine through a Modular Intake Tube (MIT) that can improve airflow up to 400 CFM over the restrictive stock intake tube. Made from cross - linked, high - density polyethylene, the MIT straightens out air flow by providing a smooth, unrestricted path that increases air flow to the engine.