Largest filter area for superior high-flow filtration and fewer filter cleanings. Exclusive 5 inch bellows accommodates engine movement and prevents component damage. Cooler temps, more power and MPG, plus a cleaner-running engine.Testing, testing & more testing.Banks Ram-Air Intake Systems are tested and proven. They start out as CAD software prototypes and are put through flow simulations. After a hardware prototype is made, it's tested on a flowbench. Then it's tested on the vehicle. And finally, Banks' density-tests the Ram-Air against stock and many competitors.Proven design. Proven performance.Banks Ram-Air Intake maximizes the flow of cool, dense air to the engine for greater power and fuel economy. Thanks to its enclosed cold-air housing, huge inlet with giant dome-shaped filter, and streamlined internal design, it flows 47% better than stock! Infact, it performs so well that it delivers greater air density to the turbo's inlet than all competitors tested. Add on the optional Super-Scoop, and the results are even better!It's all about density.And Banks Ram-Air Intakes deliver. The harder you work your truck, the more Banks Ram-Air Intake improves power and fuel economy!Longer service life, too.An aftermarket exclusive: with 5" bellows, Banks Ram-Air accommodates engine movement, which protects the components and extends service life. What's more, Ram-Air is designed to not cause fault or error codes.