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. Thanks to its enclosed cold - air housing, huge inlet, giant dome - shaped 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 47 better than stock. And delivers greater air density to the turbo's inlet than the stock system and every competitor 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.