HKS Super Mega Flow (SMF) Reloaded Intake Kit for the S13 SR20DET was made to dramatically reduce the restriction caused by factory air boxes. The filter assembly has the same patented Super Funnel design from the previous generation, but also features new technical advances. The filter cage allows for 30% more intake surface areas along with an aluminum back plate for added strength. Also equipped is a sealing ring to reduce contaminants from entering into the engine. On top of that, the element has a 3-Layer triple density dry filter element for maximum air filtration. Kit comes with all the hardware needed for a true bolt on installation.