Feeds your Cummins engine cooler, denser, outside air for greater power and fuel economy. Up to 66% greater flow over stock. Extensively tested and validated. Banks Ram-Air Intake feeds your Cummins engine cooler, denser, outside air for greater power and fuel economy. Up to 66% greater flow over stock. Its performance is extensively tested and validated: in the computer, using Computational Fluid Dynamics software - on the flowbench - and later, on the vehicle. Let the others build and ship: Ram-Air's performance is proven, again and again! Key Features: Extensively tested & validated. Enclosed housing keeps out hot, power-robbing engine air. Inhales cooler outside air for more power & MPG. Giant filter maximizes high-flow filtration. Helps engine run cooler. Accommodates engine movement. Prevents component damage. Extends service life and requires fewer cleanings. Dry Air Filter element. 5-year Limited Warranty.