All performance K&N air filters are pre oiled and don't require re oiling for thousands of kms. K and Npod filters, panels filters etc come with a million mile warranty. They are washable and reusable!

80mm Pof Filter, RF-9160 Specifications
Air Filter Large End Diameter: 4.938 in (125 mm)
Base Outside Diameter: 4.938 in (125 mm)
Top Outside Diameter: 3.5 in (89 mm)
Flanges: 1
Flange Inside Diameter: 3.156 in (80 mm)
Flange Length: 0.938 in (24 mm)
Flange Type: Centered
Height: 4.344 in (110 mm)
Filter Material: Cotton Gauze
Top Material/Finish: RUBBER
Weight: 1 lb (0.5 kg)

Product Box Length: 7.13 in (181 mm)
Product Box Width: 7.13 in (181 mm)
Product Box Height: 7.25 in (184 mm)