The Banks 25977 Techni-Cooler Intercooler Kit is the perfect way to optimize air pressure and distribution going into your LB7 Duramax 2001-2004's intake manifold. High-efficiency custom-machined durable cast end tanks work together with a raised boost (without increasing turbine drive pressure) to cooler EGTs, leading to more MPG and constant-duty power. Additionally, this Intercooler Kit improves flow of oxygen-rich air into cylinders, has a 25% thicker core with 34% more volume, and comes with 3 inch mandrel-bent boost tubes. Plus, it's easy to install and accommodate stock mounting points. Best of all, it comes with a 2-year Warranty.