Banks Ram-Air Intake feeds your Cummins engine cooler, denser, outside air for greater power and fuel economy. Up to 66 percent 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-Airs performance is proven, again and again! Ram-Air Cold-Air Intake System, Oiled Filter for use with 2013-2018 and up Ram 6.7L Cummins Diesel