K&N Performance Cold Air Intake Kit 69-2545TP with Lifetime Filter for Dodge Challenger/Charger, Chrysler 300 6.4L V8 Estimated horsepower gain of 22.24 HP at 5216 RPM Designed to improve throttle response and engine sound Easy to install, usually in 90 minutes or less Replaces stock air intake system Lasts up to 100,000 miles before service is required (depending on driving conditions)