K&N Performance Cold Air Intake Kit 69-3529TP with Lifetime Filter for 2011-2014 Ford Mustang 3.7L V6 Estimated horsepower gain of 11.79 HP at 5900 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)