Air filter Inside Diameter:42mm. 30degree Cap S

size:H=36,D1=61,D2=51 It fits most Chinese for 50-200CC ATVs & Dirt Bikes, 125cc Go Karts, please check pictures and specifications for compatibility.# Higher air flow than normal filter for maximum power # Race tested for performance and reliability # Race filters increase air flow by up to 25% over standard filters # High quality ensured