K&N cold air intake for 1997–2004 Ford F-150 V6 4.2L uses a roto-molded HDPE intake tube to increase airflow and is paired with a washable, reusable oiled cotton high-flow filter. The oversized conical filter can allow long service intervals and the kit includes a custom heat shield; most installs complete in under 90 minutes. CARB legality varies by part.
K&N 97-04 Ford F-150 V6-4.2L Performance Intake Kit