K&N Performance Cold Air Intake Kit 69-2526TP with Lifetime Filter for Dodge Magnum/Challenger/Charger, Chrysler 300C 5.7L/6.1L V8 Estimated horsepower gain of 11.66 HP at 4854 RPM Designed to improve throttle response and engine sound Easy to install, usually in 90 minutes or less Replaces entire factory air intake system Lasts up to 100,000 miles before service is required (depending on driving conditions)