Cold Air Intake for 2004-2005 Chevy / GMC Duramax LLY 6.6L is a vehicle-specific S&B cold air intake kit with a dry extendable filter media option for 2004-2005 Chevy / GMC Duramax LLY 6.6L diesel applications. It is designed to replace the factory air intake assembly with an application-matched intake system while keeping service access straightforward. The SKU-specific media type in this row should be used when ordering replacement filters or matching customer preference. Confirm the listed year, make, model, engine, and emissions requirements before installation.