The K And N Apollo Cold Air Induction System for the 06-13 Miata is designed around a washable/reusable K And N high flow air filter within a protective shell. The Apollo's shell reduces heat build-up and is fed cool air through an included intake duct resulting in improved volumetric efficiency and increased power gains. Installation is quick and easy with all the included necessary hardware. Best of all the kit is backed by the famous K And N Million Mile Warranty.