K&N RU-1100 Universal Clamp-On Air Filter: Oval Straight; 2.25 in (57 mm) Flange ID; 5 in (127 mm) Height; 4.5 in x 3.75 in (114 mm x 95 mm) Base; 4.5 in x 3.75 in (114 mm x 95 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