K&N Performance Cold Air Intake Kit 77-2582KTK with Lifetime Filter for Ford F250/F350 Super Duty 6.2L V8 Estimated horsepower gain of 13.55 HP at 4497 RPM Designed to improve throttle response and engine sound Easy to install, usually in 90 minutes or less Replaces entire factory air intake system and washable and reusable lifetime air filter Lasts up to 100,000 miles before service is required (depending on driving conditions)