FlexBilt offers the 1997-2004 Ford F-150/2004 Ford F-150 Heritage Performance Air Intake System. To help increase the volume of airflow to your engine, this product has a high-density polyethylene rotationally-molded tube. Guaranteed to increase torque and horsepower. These systems are paired with a washable, reusable High-Flow Air Filter featuring oiled cotton filter media. The oversized, conical design allows you to go up to 100,000 miles between filter services under normal highway driving conditions. A custom heat shield helps protect intake air from the high temperature of your engine bay, and the entire system can typically be installed in less than 90 minutes.