Description Brand New K&N RE-0870 Air Fliter Replacement K&N RE-0870 Air Filter for my 4″ Chrome 7.3L Intake Kits. K&N air filters are washable and reuse with oil. Filter come pre-oil and ready the put back on your intake kit. Mounting Flange 4″ Inside Diameter Filter Base Diameter 6″ Filter Top Diameter 4″ Filter Length 9″ Flange Length 1 3/4″ Flange Style Centered
