Banks Ram-Air Intakes start out as CAD software prototypes, are put through flow simulations and the design is refined until the simulation shows optimal performance. Then a hardware prototype is made and the design is validated on a flowbench, then dyno testing and on-vehicle testing. Banks 42255 cold-air intake with enclosed housing, huge inlet/outlet, and large filter improves flow up to 66%, increases power and fuel economy, and reduces exhaust gas temps (EGT). The stock design is wide-open to hot underhood engine air, and hot air robs your Dodge Ram of power.