Banks Ram-Air Superiority. Testing, testing and more testing. (2007-12 only) 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. Thanks to its enclosed cold-air housing, huge inlet, giant dome-shaped lifetime filter and streamlined design, Banks Ram-Air Intake maximizes the flow of cool, dense air to the engine for greater power and fuel economy. It flows 50% better than stock-and delivers greater air density to the turbo's inlet than the stock system and all competitors tested. Add on the optional Super-Scoop, and the results are even better! Longer service life, too. An aftermarket exclusive: with 41/2 inch 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. It's all about density. And Banks Ram-Air Intake delivers. The harder you work your truck, the more Banks Ram-Air Intake improves power and fuel economy!