K&N 57-2542 FIPK Performance Air Intake System Estimated horsepower gain of 9.33 HP at 3696 RPM Intake pipe material:High-density Polyethylene.Designed to improve throttle response and engine sound Lasts up to 100,000 miles before service is required (depending on driving conditions) Replaces entire factory air intake system Easy to install, usually in 90 minutes or less