This air filter is specially designed for GY6 scooters and ATVs and belongs to the category of air filters. It is well - designed with a variety of matching specifications to meet the needs of different users. In terms of connection, there are multiple options for connection threads, seal ring sizes, inner diameters, intake pipe diameters, and exhaust pipe diameters, including 35mm, 38mm, 42mm, 45mm, and 48mm, ensuring a tighter and more precise fit with various vehicle models. It comes in two types: straight - mouth and inclined - mouth, which can adapt to different installation environments and usage scenarios. The flexible design makes installation more convenient. In terms of external dimensions, it has a 45mm diameter, a width of 100mm, and a height of 120mm. The overall outer diameter × height is 12x10cm. This size design not only ensures the efficient filtration of the air filter but also doesn't take up too much space. As a motorcycle modification accessory, it features high flow, which can provide sufficient clean air for the engine, helping to improve the performance and efficiency of the engine. It makes the vehicle's power output smoother and offers a better riding experience. Whether for daily rides or driving on special terrains like beaches, it can perform excellently. It is an excellent choice for enhancing the performance of GY6 scooters and ATVs.