The Blox Racing air filter assembly for the Mitsubishi Evolution VIII & IX features a high-flow, dry element filter and a polished aluminum base that directly mounts to the factory mass airflow (MAF) sensor. The dry filter prevents the MAF sensor from becoming soaked with oil that is normally associated with wet filter brands. The Blox Racing filter assembly is dyno-proven to increase horsepower and torque and is extremely easy to install. Each assembly comes with mounting studs and nuts.