If youre looking for greater power and fuel economy for your 2017-2019 Chevy or GMC 6.6L Duramax L5P, Banks Ram-Air Cold Air Intake Systems are tested and proven. 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 outflows the stock intake and delivers greater air density to the turbos inlet than the stock system and every other competitor tested! D-161-118 Banks Ram-Air Intake Systems deliver. The harder you work your truck, the more Banks Ram-Air Intake improves power and fuel economy! With large oversized bellows, Banks Ram-Air accommodates engine movement, which protects the components and extends service life. Whats more, Ram-Air is designed to not cause fault or error codes.