AFE 54-12172-C Carbon Fiber Cold Air Intake System (w/Pro 5R Filter) for 11-24 300 / Challenger / Charger 6.4L 392. This high-performance Cold Air Intake System delivers dyno-proven gains of up to 21 HP and 27 lbs. x ft. TQ, while outflowing the factory intake by 15%. With a measured flow of 650 CFM @ 7" H2O, it significantly enhances airflow and overall engine performance.