K&N Performance Cold Air Intake Kit 71-2582 with Lifetime Filter for Ford F250/F350/F450/F550 Super Duty 6.7L V8 Power Stroke Diesel Estimated horsepower gain of 13.76 HP at 2200 RPM Dry synthetic air filter Easy to install, usually in 90 minutes or less Washable and reusable K&N Million mile limited warranty