K&N RC-9770 Universal Clamp-On Air Filter: Round Tapered; 3.313 in (84 mm) Flange ID; 4.375 in (111 mm) Height; 4.75 in (121 mm) Base; 3.5 in (89 mm) Top Designed to increase horsepower and acceleration Hundreds of sizes and shapes for most applications High air flow with excellent filtration Clamp-on washable and reusable air filter Pliable flanges absorb vibration and can be stretched up to 1/16 In. to fit in-between sizes