Outflows the stock setup by up to 63. Streamlined design with complete air filter housing draws in cool, under - vehicle air for greater power. Includes High - Ram intake plenum. Banks Ram - Air Superiority. (5.4L V - 8 engine only) Banks opens up your truck's breathing with a flowbench - developed and dyno - proven Ram - Air Intake System. Featuring a unique High - Ram intake plenum, this system outflows the stock setup by up to 63 percent. The Banks Ram - Air features a filter with a huge outlet, deep filter pleats to maximize flow, and a wide - open streamlined design. This complete air filter housing draws in cool under - vehicle air which is denser for greater power. Ram - Air Cold - Air Intake System, Oiled Filter for use with 2004 - 2008 Ford 5.4L, F - 150. US Patent 10,138,851 B2