K&N RC-1820: RC-1820 Oval Tapered Universal Clamp-On Air Filter Flange Dia - F: 2 in., 51mm
2 in. (51 mm) Flange Diameter
Oval Tapered Air Filter Flange Dia - F: 12'', 51mm Length - L: 2.75'', 70mm Base Dim - MA: 4'', 102mm Base Dim - SA: 3'', 76mm Top Dim - MA: 3'', 76mm Top Dim - SA: 2'', 51mm Top Style: Metal Flange Length - FL: 0.625'', 16mm