Closed Box Air Intake w/Powercore Filter 09-14 Silverado/Sierra 1500/Yukon 1500/Denali/Escalade/Avalanche VolantVolant air intake systems utilize a high velocity venturi filter adapter which provides a smooth transition through the MAF sensor into the intake tube for a much needed airflow improvement over the factory rubber tubing and resonator box. Volant's Cold Air box is larger than the factory unit and incorporates a larger opening to collect a higher volume of colder ambient air. This model includes a no maintenance PowerCore filter. By using Donaldsons