K&N Performance Air Intake Kit 63-3082 with Black HDPE Tube and Lifetime Red Oiled Filter for Escalade, Silverado 1500, Suburban, Tahoe, Sierra, Yukon, Denali, XL Estimated horsepower gain of 10.68 HP at 5341 RPM Designed to improve throttle response and engine sound Easy to install, usually in 90 minutes or less ; Air Filter Material: Cotton Gauze Replaces entire factory air intake system. Free-flowing high density polyethylene tube Not legal for highway use in states adopting California emission regulations