Airaid 700-450 Universal Clamp-On Air Filter: Round Tapered; 3.5 in (89 mm) Flange ID; 6 in (152 mm) Height; 6 in (152 mm) Base; 4.625 in (117 mm) Top Utilize a urethane body that won't crack or curl Increased airflow of up to 20% over OEM filters Multiple Cotton Gauze layers and a SynthaFlow layer assure the cleanest air possible from any washable filter Washable and re-usable so you will never need to buy another for your vehicle Backed by a "no hassle" lifetime warranty