K&N RU-4410 3.5 Inch Inlet Universal Round Tapered Rubber Air Filter Designed to increase horsepower and acceleration; 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 ?Flange inside diameter / Flange length: 3.500" / 0.625" Height: 3 Inch