K&N Performance Cold Air Intake Kit 77-3076KTK with Lifetime Filter for 2011-2013 Chevrolet Silverado, GMC Sierra 6.0L V8 Clamp Material - Stainless Steel Estimated horsepower gain of 10.23 HP at 5033 RPM Designed to improve throttle response and engine sound Easy to install, usually in 90 minutes or less Replaces entire factory air intake system Lasts up to 100,000 miles before service is required (depending on driving conditions)