Airaid Intake System GMC Yukon XL Denali 2008. Whether you need it for towing, hauling or you just like having more explosive power than the rank and file, the Airaid Intake System is right on target. By feeding your engine more air, you'll unleash a greater amount of its untapped potential. You'll experience an increase in air flow (as much as 20%), more torque (up to 20 lbs.), a boost in power (approaching 20 horsepower) and often better fuel economy (1-2 mpg, depending on driving style). The Airaid's mandrel-formed inlet tubing is powder coated, inside and out, for greater flow, protection against harsh elements and great looks. The reusable Premium Direct-Fit Filter gives your engine the cleanest air possible and is guaranteed for life. Amazingly, the Airaid Air Intake System installs in about 30 minutes without much more than a screwdriver. It's custom designed for your specific vehicle, so the Airaid Air Intake System nestles in just right. And, your Airaid Intake System is covered by a Lifetime Warranty. 2008 GMC Yukon XL Denali Airaid Intake System. Gas Saving Products, Air Intakes.