K&N 77-1529KP Polished Performance Air Intake Estimated horsepower gain of 6.8 HP at 4743 RPM Designed to improve throttle response and engine sound Easy to install, usually in 90 minutes or less. Washable and reusable lifetime air filter Replaces entire factory air intake system Lasts up to 100,000 miles before service is required (depending on driving conditions)