Upgrade the intake system in your 2004.5-2005 GM 6.6L Duramax LLY with theÂ AEM Brute Force Diesel Intake System 21-8017D. Specially designed and tuned to increase horsepower while improving engine sound and acceleration. The AEM Brute Force Intake Systems feature a low-restriction aluminum intake tube and installs easily with normal hand tools. Once installed, your engine will breathe through a high-flowing, washable and re-usable oil-free filter media that can last up to 100,000 miles before cleaning (depending on driving conditions).Â Features: Increased FlowÂ Increased Performance Mandrel-Bent Aluminum Intake Tube AEM Lifetime Limited WarrantyÂ CA Residents: CARB E.O. Number on file - LEGAL for use in California.