TheÂ AEM 21-9032DSÂ Brute Force HD Intake System gives your 2011-2012 GM 6.6L Duramax LML and increase in horsepower, torque and efficiency. Designed as a bolt-in replacement for your factory intake system, this kit replaces the restrictive factory air filter, and air box, for a more free-flowing system that is tuned, and dyno-tested. The oval cylinder shaped AEM Dryflow air filter is made from an oil-free, synthetic filter media that can be used for up to 100,000 miles before cleaning is needed (depending on driving conditions). The intake tubing is an aerodynamically engineered and highly durable polyethylene tube. This air intake system was developed to accommodate the engines factory emissions control devices including the mass air flow sensor and an AEM filter minder.Â Each kit comes ready to install and only requires basic hand tools for installation. Backed by AEM's lifetime limited warranty, this intake system is the perfect choice for your LML Duramax.Â Features:Â Increased PerformanceÂ Washable & Re-Usable, "Dry" Filter Media Filter Lasts Up To 100,000 Miles Before Cleaning AEM Lifetime Limited Warranty CA Residents: CARB E.O. Number on file - LEGAL for use in California.