This Banks Ram - Air Cold Air Intake Kit (Part Number: 42132 / 42132 - D) is a game - changer for your 2001 - 2004 GMC/Chevrolet 2500/3500 with a 6.6L LB7 Duramax engine. It starts as a CAD prototype, goes through flow simulations, and is refined for optimal performance. After that, it's tested on a flowbench, dyno, and in - vehicle. The enclosed housing, huge inlet/outlet, and large filter work together to improve airflow by up to 57%. This means more power, better fuel economy, and lower exhaust gas temperatures (EGT). The stock design exposes the engine to hot under - hood air, which saps power. The Banks Ram - Air has a giant lifetime filter in an enclosed cold - air box, drawing in cooler, denser outside air for more power, better mileage, lower EGTs, and less sooty smoke. The bellows accommodate engine movement, preventing component damage and extending the service life. It features an enclosed housing, a giant filter for high - flow filtration, and comes with a 5 - year limited warranty (lifetime limited warranty for the filter). You can choose between a dry or oiled air filter element, and it won't trigger any fault or error codes.

Using this cold air intake kit is easy. First, find a suitable place to work on your vehicle. Make sure the engine is cool before starting the installation. You can click the provided link for detailed installation instructions. When using your vehicle with the new intake kit, you'll notice improved power and fuel efficiency right away. For maintenance, the filter has a lifetime limited warranty. However, it's a good idea to check it regularly. If it gets dirty, you can clean it according to the type of filter you have (dry or oiled). Avoid driving through deep water as it can damage the intake system. If you notice any unusual noises or performance issues, check the bellows for any signs of damage, as they are there to accommodate engine movement and prevent component damage. Keep this intake kit in good condition, and it will serve you well for years.