Airaid 201-229 Cold Air Intake System w/ Dry Filter | 2004-2005 GM 2500HD/3500HD 6.6L Duramax LLY

Features: - Increases horsepower and throttle response - Red dry filter ideal for daily driving - Replaces restrictive factory air intake system - One-piece roto-molded air box design - Cross-linked high-density intake tubing - Washable and reusable air filter media - No recalibration required after installation - Helps maintain correct air-fuel ratios - Easy installation with standard hand tools - Improved airflow and filtration efficiency - Backed by AIRAID’s No Hassle Lifetime Warranty High-Performance Intake System for GM Duramax LLY If you're running a 2004–2005 GM 2500HD or 3500HD with the 6.6L Duramax LLY, you know how important airflow is when it comes to performance. Whether you're towing heavy, daily driving, or just want a little extra response under your right foot, the Airaid Cold Air Intake System with a dry filter is a solid upgrade that checks all the right boxes. It gives your truck the breathing room it needs, all without the hassle of tuning or complex install work. Right away, you’ll notice this isn’t just a filter swap. Airaid replaces the entire stock intake setup—air box, tubing, filter, all of it—with a high-flow system built to maximize cold air delivery. The heart of it is a one-piece, roto-molded air box designed to shield the filter from engine heat, keeping the intake charge cooler and denser. That means better combustion, stronger throttle response, and more power when you need it most—especially under load or during acceleration. Heavy-Duty Intake Tube and Airbox The intake tube is made from cross-linked, high-density polyethylene, which not only helps insulate against heat but also maintains smooth airflow. It’s been designed using precise computer modeling, so mass airflow readings stay accurate, and there's no need to recalibrate anything after the install. You simply bolt it on and go. Inside the box is Airaid’s red dry synthetic filter, which is a great fit for daily-driven diesel trucks. It provides excellent filtration and airflow without the mess of oiling. Plus, it’s washable and reusable, so you’re not constantly buying replacements down the line. It’s a low-maintenance option that still delivers serious performance. From a practical standpoint, installation is straightforward. You won’t need special tools or a shop to get it done—just a basic set of hand tools and a little time in the garage. Everything fits cleanly, and the system is designed to integrate with your truck’s factory sensors and filter minder. Fits: 2004, 2005 GM Sierra/Silverado 2500HD/3500HD 6.6L Duramax LLY