Cold - air intake with large lifetime filter, enclosed housing and large tubing doubles stock flow, increasing power and fuel economy. Banks Ram - Air Superiority. 4.0L 6 - CYL 1997 - 06 Wrangler TJ. Banks Ram - Air Intake System replaces the factory's flat panel filter with a large conical filter that provides maximum high - flow filtration. The Ram - Air's opening is over twice as big as stock's, and without the 90 - Degree detours that choke airflow and kill power. The huge inlet, enclosed housing and much larger tubing reduce restrictions, dramatically improving airflow to the cylinders. The results are impressive Banks Ram - Air Intake more than doubles the factory intake's airflow, improving the Jeep's power and fuel economy. And Banks Ram - Air is designed to accommodate engine movement, which prevents component damage for reliable service life. Ram - Air Cold - Air Intake System, Oiled Filter for use with 1997 - 2006 Jeep 4.0L Wrangler TJ. US Patent 10,138,851 B2