Features: 1.High flow air filter reduces the intake air resistance of the engine, and increases the intake air volume and volumetric efficiency per unit of time while the engine is running. 2.The hemispherical structure allows the chaotic air flow to spread evenly in six directions that allow the air to form a smooth flow. 3.The fan-shaped part of the inner skeleton is designed with 16 radial stents that are relatively resistant, more reliable and practical. 4.The funnel-like structure can be clearly seen in the circular arch-shaped support section, if the fungus head is broken. 5.This design creates a vacuum area inside the mushroom head, to forces air to be absorbed. So the area of sector is not wasted, to have greater actual suction area. 6.High quality aluminum alloy material, it is durable, practical, and easy to install. Specification: Item Type: Air filter_x000D_ Condition: Brand new_x000D_ Material: Aluminum alloy_x000D_ Optional Color: Blue, carbon fiber, red_x000D_ Size: Approx.76mm/2.99in_x000D_ Fitment: Suitable for 76mm/2.99in auto PackageList: 1 x Air Filter