K&N RC-3690: RC-3690 Round Tapered Universal Clamp-On Air Filter
3.5'' (89 mm) Flange Diameter
Round Tapered Universal Clamp-On Air Filter Flange Inside Diameter: 3.5" (89 mm) Flange Length: 1.75" (44 mm) Flange Type: Centered Height: 9" (229 mm) Base Outside Diameter: 6" (152 mm) Top Outside Diameter: 4.5" (114 mm)