K&N UNIVERSAL AIR FILTERS K&N"s Universal Air Filters are designed and manufactured for a wide variety of applications. Regardless of the angle, offset diameter of the air intake, there is a K&N Universal air filter for your equipment. All filters are constructed with ultra-strong molded pliable rubber flanges which absorb vibration and allow for secure attachment and can also be stretched for up to 1/16 (1.5mm) to fit in-between sizes. K&N Universal air filters are available in round, tapered (cone style) and oval designs, for just about any special application. Flange Inside Diameter: 1.688 in (43 mm) Flange Outside Diameter: 3 in (76 mm) Length: 5 in (127 mm) Top Style: Rubber Flange Length: 0.625 in (16 mm) Flange Angle: 0 degrees Flange Offset: 0 in (0 mm) Type: Straight