This Banks Ram - Air Cold Air Intake Kit, part number 42135, is a high - performance upgrade for 2004 - 2005 Chevy/GMC 2500/3500 trucks with a 6.6L Duramax, LLY engine. It starts as a CAD prototype and goes through flow simulations, refinement, hardware prototyping, flow bench testing, dyno testing, and on - vehicle testing. The stock filter design lets in hot underhood air, which reduces power, but this Banks intake has bellows to handle engine movement, preventing damage and ensuring a longer service life. It features an enclosed housing, a giant filter for high - flow filtration, a 5 - year limited warranty (lifetime for the filter), increased power and fuel economy, reduced exhaust gas temps and smoke, and it outflows stock and competitors by up to 57%. You can choose an oiled or dry air filter element, and it's designed to avoid fault or error codes.

Using this intake kit is easy. First, make sure your engine is cool. Remove the old intake following the installation instructions provided. Install the new Banks Ram - Air intake in place. The bellows are flexible and will fit well as the engine moves. When it comes to maintenance, check the filter regularly. If you have an oiled filter, clean and re - oil it according to the filter's instructions. For a dry filter, simply clean it as recommended. The kit is built to last, but avoid rough handling during installation to prevent any damage. Also, make sure all connections are tight to ensure optimal performance.