More power and better mileage. Beats stock and the competition. Up to 53.4% less restrictive than stock.Banks opens up your truck's breathing with a flowbench-developed and dyno-proven Ram-Air Intake System that is 53.4% less restrictive than stock on the 5.0L at 600 CFM. Ram-Air's filter has a huge outlet with deep filter pleats that maximize flow and a complete air filter housing that draws in cooler, denser air to the engine for greater power and fuel economy. US Patent #10,138,851 B2